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OutlookSignatureName behavior in the INI configuration to prevent overwriting signature names already assigned to higher-priority mailboxes.Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
Your email signature is far more than just a digital business card; it is prime advertising real estate that lands directly in your customers' line of sight thousands of times every single day.
The biggest hurdle for marketing campaigns is often technical implementation. With Set-OutlookSignatures, waiting for IT tickets is a thing of the past. You regain the autonomy needed for fast, agile marketing:
Use the summer season to anchor your brand firmly in your customers' inboxes—efficiently, automatically, and with total focus on your creative vision.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
Rolling out updates to corporate email signatures or Out-of-Office (OOF) templates in a live production environment can be nerve-wracking. For Marketing, a single broken placeholder or misaligned banner ruins brand consistency across thousands of external emails. For IT, a faulty script or deployment mishap can trigger a flood of helpdesk tickets or accidentally overwrite a VIP's critical, custom out-of-office message.
When preparing a rollout, these stressful questions inevitably pop up:
Relying on standard test environments rarely offers peace of mind. Why? Because maintaining a parallel staging environment that accurately mirrors active Active Directory/Microsoft 365 production objects is a massive IT overhead.
Even when a test environment is available, two roadblock questions remain:
Sure, testing is easy enough using your own mailbox, or by walking over to an immediate colleague's desk to ask them to open Outlook. But that casual approach completely falls apart when it comes to leadership.
How often can you actually walk into the office of your CEO just to "double-check that their signature alignment looks right"? Interrupting high-level executives for routine layout checks is disruptive, impractical, and frankly looks unprofessional. Yet, leaving their layouts untested is a massive gamble, because their emails are the most visible in the entire organization.
Set-OutlookSignatures bridges this gap entirely with its built-in Simulation Mode. This powerful feature allows both IT and Marketing to test live template logic safely inside your production environment, without altering a single byte of live user data—and without knocking on the CEO's door.
Instead of writing to the local Outlook registry or syncing directly to live Exchange/Outlook for the Web (OWA) mailboxes, Simulation Mode calculates exactly how the logic will execute for any specified target user. It then writes the final, fully rendered HTML/DOCX signatures and OOF messages directly to a secure, designated preview path (AdditionalSignaturePath parameter).
What makes Simulation Mode a "real-world" validator is its ability to handle complex scenarios that a simple "preview" button can't:
Stop deploying signature changes with your fingers crossed. By utilizing Simulation Mode, you get a 100% accurate, data-driven preview of your email signatures and OOF replies based on live production data and future timelines, with absolutely zero risk of disruption.
It's the absolute certainty your brand requires, with the strict security controls your IT infrastructure demands.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
At first glance, the choice seems obvious: If someone is unavailable, they enable an out-of-office reply. If they want to respond automatically, they create a rule. In practice, however, the decision is less trivial — especially in larger organizations, with shared mailboxes, and wherever consistent communication, corporate design, and traceable processes matter.
Both features can automatically respond to incoming emails. The key difference lies in how often, where, by whom, and with what content these replies are sent and managed.
Out-of-office replies are the right choice when a person is temporarily unavailable, for example due to vacation, illness, part-time work, training, parental leave, or a business trip.
Their greatest advantage is the built-in protection mechanism: Exchange normally sends only one automatic reply per sender. If the same person writes several times, they are not notified again every time. This prevents unnecessary email overload and reduces the risk of automatic reply loops.
Typical benefits of out-of-office replies:
One reply per sender
Ideal for personal mailboxes, because repeated messages from the same sender do not trigger a new reply each time.
No cluttering of the "Sent Items" folder
Out-of-office replies are not stored in the Sent Items folder like regular user replies.
Separate internal and external messages
Internal recipients can receive more detailed information, while external recipients receive a more neutral or deliberately reduced message.
Can be scheduled
Start and end dates can be defined in advance. This reduces forgotten activations or deactivations.
Can be managed by authorized roles
Managers, help desks, or administrators can set out-of-office replies, depending on permissions, even if users do not have access themselves.
Lower risk of reply loops
Because not every incoming message is answered, out-of-office replies are usually the safer default option for personal mailboxes.
However, there are also limitations. Design options are limited, especially when images, banners, or highly designed content are required. In many environments, this is perfectly sufficient — in others, it is a reason to consider complementary solutions.
Autoresponder rules are particularly suitable when a mailbox does not represent an individual person, but a function: support, sales, HR, data protection, accounting, or a project team.
In such scenarios, the goal is often not to say, "I am not available", but rather: "Your message has been received", "We will take care of it", "Please use this channel", or "Changed response times apply during the holidays."
Typical benefits of autoresponder rules:
Reply to every received message
Useful when every incoming message should be acknowledged, for example in support or service mailboxes.
Replies appear in the "Sent Items" folder
This can be helpful when it should be traceable which automatic replies were actually sent.
Easy to edit by people with full access
Whoever manages the shared mailbox can often also adjust the rule without having to initiate a separate administrative change.
More design flexibility
Rules with templates can be better suited in some scenarios for designed replies, campaign messages, seasonal texts, or visual elements.
Well suited for function-based communication
A shared mailbox often needs different messages than a personal mailbox — for example information about service hours, ticket numbers, alternative contact channels, or holiday arrangements.
The downside: If every message is really answered, careful planning is required. Rules should be clearly limited and tested so that automatic reply loops, duplicate acknowledgements, or unwanted replies to system messages are avoided.
| Scenario | Better choice | Why |
|---|---|---|
| Personal vacation | Out-of-office reply | Replies only once per sender and can be scheduled |
| Illness or unplanned absence | Out-of-office reply | Can also be set by authorized people if needed |
| Part-time work or regular unavailability | Out-of-office reply | Well suited for recurring notices with return or availability information |
| Support or service mailbox | Autoresponder rule | Every incoming message can be acknowledged |
| Shared HR, sales, or project mailbox | Autoresponder rule | Function-based communication instead of personal absence |
| Holiday or seasonal notices | Depends on the mailbox | Personal mailboxes tend toward OOF, shared mailboxes toward rules |
| Designed reply with image or banner | Often autoresponder rule | More flexibility for layout and visual elements |
Precisely because autoresponder rules appear more flexible, they are sometimes also used for personal absences. In most cases, this is not a good idea.
A personal mailbox should not reply again to every single message. Someone who writes ten emails to the same person during a vacation normally does not need ten identical replies. In addition, rules can be harder to control when users create, copy, or forget to disable them themselves.
For personal unavailability, out-of-office replies are therefore the better and more robust choice in most cases.
In companies, it is rarely just about sending some kind of automatic reply. It is about ensuring that automatic replies:
This is exactly where many organizations encounter the gap between technical functionality and professional implementation. Outlook and Exchange provide the mechanics. The challenge is to turn them into a standardized, maintainable, and user-friendly process.
With Set-OutlookSignatures, you can deploy standardized out-of-office replies — internal and external — with the same flexibility as email signatures.
Instead of having users write their own messages for every absence, organizations can provide approved templates. These templates can include central content, for example:
In most cases, users only need to enter their return date before activating the assistant. This reduces errors, saves time, and ensures that absence communication appears just as professional as the regular email signature.
Out-of-office replies and autoresponder rules solve similar tasks, but they are optimized for different situations.
For personal absences, out-of-office replies are almost always the better choice: They are safer, more restrained, and can be cleanly controlled for internal and external recipients.
For shared mailboxes, autoresponder rules can make more sense: They acknowledge every incoming message, can often be designed more flexibly, and are better suited to function-based communication.
The best solution is not to use one method for everything. What matters is choosing the right method for the right mailbox — and providing the content centrally, consistently, and maintainably.
Set-OutlookSignatures helps move out-of-office replies out of the category of "personal individual decision" and turn them into a professionally managed part of corporate communication.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
Microsoft starts turning off EWS for Exchange Online in October 2026. If you have not already done so, move to Set-OutlookSignatures v4.26.0 or newer and update your Entra ID app permissions as described in the v4.26.0 release notes (Set-OutlookSignatures and Benefactor Circle add-on sections).
Reference: https://techcommunity.microsoft.com/blog/exchange/exchange-online-ews-your-time-is-almost-up/4492361
This release adds a graphical INI file editor for Set-OutlookSignatures configuration files. It is web-based, but designed to run anywhere you need it.
Why it matters:
What you get:
How to use it:
.\sample code\IniEditor.htmlCredits: This tool was donated by ExplicIT Consulting, the providers of the Benefactor Circle add-on.
v4.27.0 improves permission guidance in a way that helps audits and reduces long-term drift:
The goal is simple: Help you keep app registrations aligned with least-privilege without manual comparison work.
Runtime can vary significantly on laptops and energy-saving configurations. v4.27.0 logs when:
This gives you an immediate explanation for slow execution in the field. Details: https://set-outlooksignatures.com/faq#windows-power-mode
HTML signature rendering can be sensitive to small attribute differences. v4.27.0 improves the conversion of width and height attributes into style attributes by treating values without units as px, preventing layout surprises.
Microsoft Graph can return inconsistent roaming signature information, which can lead to missing default signatures for additional or automapped Exchange Online mailboxes. v4.27.0 adds a workaround in the data preparation step used by the Outlook add-in, improving reliability in multi-mailbox environments.
The add-in receives security hardening and better diagnostics:
Cross-platform and stability fixes:
For verification workflows:
Release page: https://github.com/Set-OutlookSignatures/Set-OutlookSignatures/releases/tag/v4.27.0
INI editor: https://set-outlooksignatures.com/inieditor
For a full list of changes - including fixes, updated modules and updated documentation - please refer to the official v4.27.0 changelog.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
If you’re managing signatures for an organization, ensuring your design looks pristine in both light and dark settings is paramount. Here is your definitive guide to designing dark mode-friendly email signatures, navigating the treacherous waters of mail client support, and implementing ingenious failsafe solutions.
Unlike web design, which universally supports CSS media queries, email rendering is fragmented. Dark Mode support varies wildly, and even when a client supports it, how it applies Dark Mode is inconsistent:
Basically, no mail client besides Apple Mail and some mobile apps supports the essential @media (prefers-color-scheme: dark) CSS query.
This is no surprise, as CSS is generally poorly supported across email clients - with different sets of supported features, often not only depending on the email client, but on the platform it runs on.
The root cause for this? For historic reasons, nearly every email client comes with its own integrated parser and renderer for HTML and CSS. Keeping on-par is hard work, and switching to the system browser would mean that all the non-standard interpretations of the own renderer would be gone and old emails might look off.
For the small percentage of clients that support it (primarily Apple Mail and some mobile apps), you can define a dedicated dark mode style.
The golden standard is using the @media (prefers-color-scheme: dark) CSS query. CSS
/* In the <style> block of your signature HTML */
@media (prefers-color-scheme: dark) {
.darkmode-text {
color: #ffffff !important; /* Force white text */
}
.darkmode-link {
color: #9999ff !important; /* Force a legible link color */
}
}
The problem: This code is ignored by the most common corporate clients (Outlook Desktop, Gmail Web). You need a more robust, failsafe plan.
When CSS fails, you must rely on smart design choices that work regardless of the client's Dark Mode settings. The goal is to design an element that looks good in both white-on-white and black-on-dark scenarios.
For logos, the biggest risk is a dark logo (e.g., black text or dark icon) disappearing against a dark background when the client swaps colors.
The Solution: Use PNG with transparency and a subtle white outline/glow.
Instead of trying to programmatically swap the image, modify the image file itself:
Result in light mode: The white glow blends perfectly into the white email background, making the logo appear exactly as intended.
Result in dark mode: When the client converts the white background to black/dark gray, the subtle white outline acts as a built-in contrast border, ensuring the dark logo elements are clearly visible and separated from the dark background.
Ensure maximum contrast for all text elements to survive any inversion attempts by mail clients.
You should do this anyhow, as high contrast is an important accessibility feature, and creating barrier-free signatures should be default by now.
For backgrounds/separators: If you use separator lines, define their color clearly. Use colors that retain high contrast even after a mild inversion (e.g., mid-gray becomes mid-gray, which is legible on both black and white).
For text color: Rely on pure, contrasting colors (like #000000 on a light background) to encourage the client's inversion logic to correctly swap it to a legible white/light color in Dark Mode.
Rely on borders for spacing instead of simply blank <td> cells with background colors, as background colors are prone to inversion. For example, instead of a colored cell for a separator, use a <div> or a cell with a 1px border that is the color you want to retain.
The core challenge for email signature designers is that the most broadly used corporate mail clients (specifically Outlook and Gmail) do not allow the same grade of Dark Mode customization as modern web browsers. Their rendering quirks and aggressive inversion techniques make the pursuit of a fully Dark Mode compatible signature template an inefficient effort.
Therefore, the pragmatic and most effective strategy is to design the signature template primarily for Light Mode and rely on robust, client-agnostic failsafe methods to handle inversion:
By embracing this strategy, you deliver a signature that is consistently professional and legible across all major platforms, rather than one that is technically perfect in a few compliant clients but broken in the majority.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
As Microsoft begins the multi-phase retirement of VBScript in Windows, IT departments still relying on .vbs files for Outlook signatures are sitting on a ticking clock.
When faced with deprecation, the instinct is often to manually port old VBS logic into a new PowerShell script. However, simply changing the language doesn't fix the underlying architectural problems of unmanaged legacy scripts.
The real danger isn't just the code—it’s the missed opportunity. If your reference point is an old VBS script, you might not even realize what modern email signature management is capable of. Don't miss out on an incredible feature set that a simple rewrite can never provide:
While Set-OutlookSignatures is a script-based solution, it is fundamentally different from a standalone .vbs or .ps1 file. It is a managed framework built for the modern Microsoft 365 and hybrid environment.
Moving from an unmanaged custom script to this structured framework provides a professional layer of abstraction:
While the core framework is powerful and open-source, the Benefactor Circle add-on unlocks the full potential of your corporate identity:
It’s time to move beyond the limitations of "just a script." By moving to Set-OutlookSignatures and utilizing the Benefactor Circle add-on, you aren't just fixing a broken VBS file—you are upgrading to a professional, scalable identity solution.
Don't settle for a rewrite of yesterday's limitations.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
That works well as long as your requirements stay within the boundaries of what those systems were originally designed to store.
In reality, email signatures often need to represent context, audience, and policy, not just directory fields. And that’s where things start to break down.
There are many cases where the information you want to display in an email signature does not have a natural home in the directory. Common examples include:
Trying to force this kind of information into fields like Notes, Title, or Department quickly leads to ambiguity, inconsistency, and governance issues.
This is where custom attributes come into play.
Exchange on-prem and Exchange Online provide 15 custom attributes out of the box. These fields are:
Beyond that, you can also define schema extensions in Active Directory or Entra ID for more advanced scenarios—though that comes with higher governance and lifecycle overhead and should be done deliberately.
The key advantage of custom attributes is that they allow you to store purpose-built, structured data without overloading existing fields or introducing undocumented conventions.
A common mistake is to treat custom attributes as “free-form extras.” In practice, they work best when you design them intentionally, for example:
ExtAttr1: Public-facing job title (EN)ExtAttr2: Public-facing job title (DE)ExtAttr3: Academic title (prefix)ExtAttr4: Academic title (suffix)ExtAttr5: PronounsExtAttr6: Working hours textThis kind of clarity makes the data easier to validate, document, and consume—not just for email signatures, but for other systems later on.
Set-OutlookSignatures is built to consume this kind of data without friction.
Once your attributes are populated, you can reference them directly in signature templates using predefined replacement variables, for example:
$CurrentUserExtAttr1$$CurrentUserExtAttr5$$CurrentMailboxManagerExtAttr2$This allows signature templates to remain clean and declarative, while the actual logic and data management stays where it belongs: in the directory or supporting systems.
No brittle string parsing. No duplicated template variants per department, language, or role.
Not all data belongs in the directory—and Set-OutlookSignatures doesn’t assume that it does.
For cases where directory attributes are not the right fit, you can pull data from:
This is especially useful when:
In addition, Set-OutlookSignatures allows you to use PowerShell logic to calculate values dynamically. Examples include:
One of the most powerful aspects of calculated data is conditional logic.
Instead of hardcoding content, you can define rules such as:
For example, a seasonal rule might temporarily add extended support hours during a peak period, or remove certain promotions automatically once they expire.
This turns email signatures from static templates into policy-driven communication artifacts.
Centralizing custom and calculated data has benefits beyond flexibility.
It improves:
Most importantly, it decouples presentation from data storage, which is exactly where mature identity and messaging architectures want to be.
Email signatures are often treated as a minor branding concern. In reality, they are one of the most frequently used and externally visible communication channels an organization has.
By using custom attributes and calculated data—rather than abusing standard fields or duplicating templates—you gain:
Set-OutlookSignatures provides the tooling to make this practical, robust, and transparent—without turning email signatures into yet another manual or fragile process.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
Every organization sends emails. And every email includes a signature.
Sales conversations, support replies, project updates, quotations, follow‑ups — all of them leave your organization with a visual and textual impression attached. Yet in many companies, email signatures are still treated as a personal formatting choice rather than a centrally managed communication element.
In practice, this means a channel with thousands of daily impressions remains inconsistent, outdated, or unused from a strategic perspective.
Email signatures differ from classic marketing channels in one important way: They appear in direct, trusted one‑to‑one communication.
When managed properly, they can support multiple objectives at once.
A centrally defined signature ensures that logos, contact information, disclaimers, and design elements are always correct — regardless of device, user, or location.
Without interrupting conversations, email signatures can unobtrusively reference:
This makes them well suited for long‑running or informational campaigns rather than short‑lived promotions.
In many organizations, not all information applies to all users. Signature elements can be adjusted based on:
This allows communication to remain relevant while still being centrally governed.
Without a dedicated solution, organizations often face recurring issues:
As a result, simple adjustments become time‑consuming and error‑prone.
Set‑OutlookSignatures provides a structured approach to email signature management within Microsoft Outlook and Microsoft 365 environments.
It enables organizations to:
Email signatures become predictable, maintainable, and reliable, rather than a recurring exception.
The Benefactor Circle add‑on extends Set‑OutlookSignatures with exclusive availability options, including direct manufacturer access.
This is particularly relevant for organizations that require:
It allows Set‑OutlookSignatures to be integrated cleanly into regulated or enterprise environments.
Further details are available on the Features page.
Email signatures are already part of every outbound message.
Managing them centrally ensures they support your organization instead of creating inconsistency or administrative effort.
Often, the most effective improvements come from optimizing what is already in place.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
Simple, secure, and scalable, without the overhead.
This is made possible by architecture developed from practical experience for practical use, with a focus on work simplification and data protection rather than profit.
With the Quickstart guide, you can deploy signatures within minutes, in just three easy steps.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
With this version, we are addressing the evolving needs of highly regulated industries and government sectors by introducing native support for M365 sovereign clouds, while simultaneously modernizing our core communication with Microsoft 365.
As organizations move sensitive workloads to localized, highly secure infrastructures, Set-OutlookSignatures is leading the way. We are proud to announce that v4.26.0 now supports the following sovereign cloud environments:
Due to its advanced architecture, Set-OutlookSignatures is currently the only email signature solution on the market supporting these infrastructures. You can find more information about this at Set-OutlookSignatures.com.
Furthermore, we’ve introduced a flexible configuration allowing for any future sovereign cloud environments. Using the new $CustomCloudEnvironments variable, you can define endpoints even during soft-launch phases before they are officially published by Microsoft.
Microsoft has announced the decommissioning of Exchange Web Services (EWS) in Exchange Online, starting later in 2026.
Set-OutlookSignatures is already prepared. In v4.26.0, we have transitioned to using the brand new Microsoft Graph APIs as the primary method for mailboxes hosted in Exchange Online. While a fallback to EWS is integrated for now, it will cease to function once Microsoft disables EWS later this year. For on-premises mailboxes, EWS support remains fully in place.
Action Required for Admins
To use the new Graph functionality and avoid service interruption:
- Remove the delegated permission
EWS.AccessAsUser.Allfrom your Entra ID app.- Add the delegated Graph API permission
MailboxConfigItem.ReadWrite.- For SimulateAndDeploy mode do the same for delegated and application permissions, and also remove the
full_access_as_appExchange Online permission.
To help our users better understand how our solution scales and maintains compliance, we have added a new 'Architecture considerations' chapter to our technical documentation. This section provides a deep dive into how Set-OutlookSignatures interacts with your environment securely.
For a full list of changes - including fixes, updated modules and updated documentation - please refer to the official v4.26.0 changelog.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
This guide will walk you through the formats you can rely on and the ones that are best left.
Linked images are great in theory, but often lead to problems in real life.
All this neither creates a professional impression with the recipients of your emails, nor does it make the marketing department happy.
If possible, add images directly to your signature, not as linked images.
Images can be added directly, that means not as linked image file, as Base64 embedded image or as hidden attachment.
On the recipient side, email clients released after 2015 not only support hidden attachments but also embedded images.
On the sender side, support varies slightly depending on client and platform. But no need to worry: You do not have to think about it, your email client takes care of everything.
Let's take Outlook as example: All editions on all platforms support hidden attachments, the same is true for embedded images since 2016.
Set-OutlookSignatures and the Benefactor Circle add-on support both variants, allowing you to choose a preferred option while automatically mastering situations that require the use of a specific method.
The golden rule for email signatures is compatibility over bleeding-edge technology. While new, high-efficiency image formats like WebP and AVIF are exciting for the web, the fragmented and rather traditional world of email is simply not ready for them yet.
To guarantee your professional signature renders perfectly every single time, rely on JPEG and PNG.
And remember: Embed, don't link! This keeps your images attached and visible from the moment the email arrives.
Following these simple guidelines will ensure your brand image is always presented flawlessly.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
Here are a few ways to make your signatures more impactful:
When your signatures adapt to your calendar, every email becomes a timely touchpoint that supports marketing, sales, and brand consistency.
Because the right signature at the right moment doesn't just look good - it drives attention, reinforces your message, and keeps your brand relevant in every conversation, every day.
Spring is just around the corner in the northern hemisphere, while autumn is approaching in the global south. There's no better time to make your signatures more dynamic. Let's go!
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
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Signatures cannot usually be created in real time, so they are typically pre-calculated and then made available without delay.
With almost all cloud-based signature solutions, this pre-calculation takes place on the signature provider's systems. To do this, the tools copy large portions of your Entra ID data at intervals of 15–20 minutes: user information, group memberships and much more. This transfer rarely follows the "need-to-know" principle.
The actual application of the signature also often takes place in the provider's cloud. Many overlook what this convenient feature means: Your internal and external emails are redirected to the signature provider.
Each company must decide for itself whether these data transfers are desirable and whether they are compatible with its own security and compliance requirements.
Set-OutlookSignatures takes a fundamentally different approach that meets even the most stringent data protection and security requirements.
All data remains within your existing environment without exception and is processed exclusively on your own systems.
The initial investment is just slightly higher, but you immediately benefit from maximum data protection, complete functional coverage and lower costs.
We all appreciate convenient solutions. Signature providers take the strain off administrators and users, and in return they benefit from the internal savings made by their customers.
This convenience costs more than most people realise:
However, all these tasks can be completed quickly and easily internally, and the necessary computing power is most likely already available. Above all, it is not necessary to grant another third-party provider extensive access to internal company data or to actively transfer it to their data centres.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
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The combination of Export-RecipientPermissions and Set-OutlookSignatures automates the process:
The result is fully automated, up-to-date signatures that adapt to actual usage. No manual tracking, no outdated configurations.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
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But a signature can also include content-specific features. These might be account pictures, multilingual greetings and job titles, contact details of the supervisor, directions to the office, links to personal social media profiles and self-service appointment booking.
Or something more fancy like dynamically calculated years of service in the company, a personal quote, a QR code, or a greeting automatically derived from the weather forecast?
Last, but not least, there is also the aspect of barrier-free accessibility. This helps not only people with visual impairments but also improves usability for everyone. Think of font sizes, color contrasts, and links or images with textual descriptions for screen readers.
All this - and more! - is possible with Set-OutlookSignatures and the Benefactor Circle add-on.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
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With Set-OutlookSignatures, delegation is simple and flexible. Templates are stored in regular folders on your file system or in a SharePoint document library, so all you need are standard file and folder permissions.
Here's how it works:
You can configure all of this separately for signatures and out-of-office replies. You can even run multiple instances of Set-OutlookSignatures with separate configurations in the same environment.
And the best part? Set-OutlookSignatures only needs a file share or SharePoint document library. No admin client, no server dependencies, no email rerouting.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
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With a powerful solution like Set-OutlookSignatures, you can easily implement a wide variety of signature scenarios. Here, you will learn which signatures your company needs or could benefit from.
Every employee requires a professional email signature. This is the indispensable basis for all internal and external communication.
These use cases quickly become relevant in most professional environments.
It is often beneficial to use a shorter, less intrusive signature for replies and forwards to keep the conversation clean and easy to follow.
Teams frequently use a joint mailbox (e.g., info@, support@). The challenge: the recipient needs to know who actually sent the email.
Whether it's holiday coverage, executive assistant setups, or temporary absences due to illness—emails must be answered professionally.
Different departments often have different requirements for their signatures (e.g., additional legal notices for the legal department or specialized contact information for sales).
These scenarios will help you elevate your email communication to a higher, more flexible level.
Emails sent via a Distribution List often represent a group or a topic, not a single individual. A generic signature without a personal name, but with the list's contact details, is appropriate here.
A single mailbox can have multiple email addresses (aliases). The signature should automatically insert contact details and links appropriate for the alias used (e.g., a project website if the project-x@… alias is used).
Not all information is intended for every recipient.
In globally operating companies, the recipient's or sender's language is crucial.
The signature is an excellent, cost-effective advertising space. Make use of it!
When managing signatures, it is of course important to know who is using which mailboxes. This is particularly relevant for shared mailboxes and delegates.
Set-OutlookSignatures recognizes which mailboxes are integrated in Outlook and also offers an interface to Export-RecipientPermissions. This allows you to distribute signatures for mailboxes completely automatically and dynamically — even if users have not yet set them up in Outlook. Of course, the additional signatures are automatically deleted when mailbox access is revoked.
Managing this complexity manually is impossible. A centralized solution like Set-OutlookSignatures ensures that every email, regardless of scenario or sender, is consistent, up-to-date, and legally compliant. This turns your signatures into a real asset for your company.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
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If you want to secure your corporate email communication globally, an "Ultimate Signature" is essential. Here is a breakdown of the mandatory information you must consider in the world's most important economic regions.
The strictest rules for the signature text itself are often found in Central Europe. The focus is on the complete legal identification of the sending company.
The signature must fulfill the Imprint Obligation (Impressumspflicht) and contain the following information, depending on the legal form:
| Legal Form (e.g., GmbH, UG, AG) | Mandatory Information |
|---|---|
| Company Name | Exactly as entered in the Commercial Register. |
| Legal Form | (e.g., GmbH, UG (haftungsbeschränkt), AG). |
| Registered Office | The location where the company is registered. |
| Registry Court | The competent local court (Amtsgericht). |
| Commercial Register Number (HRB/HRA) | The complete number. |
| Authorized Representatives | All Managing Directors, Board Members, or Supervisory Board Chairmen with full names. |
Important: Providing an email address and telephone number is also mandatory to ensure rapid contact.
Similar to Germany, the disclosure of the Commercial Register Number (Austria/Switzerland) and the complete legal form is required.
In Switzerland, the requirements are regulated in the Swiss Code of Obligations (CO).
In Austria, the regulations are scattered across at least five laws, which is why the Austrian Federal Economic Chamber (WKO) provides a comprehensive checklist.
In North America, less emphasis is placed on register data and more on controlling promotional emails (spam prevention).
This law applies as soon as the email is classified as "commercial". The central requirements for the sender are:
CASL is one of the world's strictest anti-spam laws, based on a strict opt-in principle. The signature must:
These regions offer a blend of Anglo-Saxon regulation and cultural necessities.
Australia combines anti-spam rules with a formal registration obligation:
In China, cultural etiquette and relationship building are often more important than the literal law text regarding the footer.
Caution for Advertising: If the email contains advertising, the word "AD" (or "广告") must be in the subject line!
To create a single signature that works worldwide, you must combine all mandatory disclosures of the strictest market (Germany) with the anti-spam elements (US/Canada) and the identification numbers (Australia/China).
| Element | Purpose |
|---|---|
| Full Company Name (incl. Legal Form) | Identification (DE, AT, CH, AU). |
| Employee Name & Title | Identification and Hierarchy (Global, esp. CN). |
| Postal Address | Legally Required (US, CA, AU) and Trust (DE, CN). |
| Commercial Register Number & Court | Imprint Obligation (DE, AT, CH). |
| Managing Directors/Representation | Imprint Obligation (DE, AT, CH). |
| ABN/ACN (if relevant) | Registration Obligation (AU). |
| Working Unsubscribe Link | Anti-Spam (US, CA, AU). |
By consistently implementing these elements in your email signature management system, you ensure that every email leaving your company is legally secure—no matter where in the world it is sent.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
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Here’s how:
We focus on practical, efficient software. And we believe every mailbox should cost the same, which is why small customers pay the same fair price as large ones.
Read all about why Set-OutlookSignatures is free and open-source and about the financial benefits of the Benefactor Circle add-on.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
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The first impression may be positive. However, mail flow rules are only useful in practice for the lowest signature requirements and if you want to disappoint your users, your marketing department, and the recipients of emails.
In a nutshell:
Mail flow rules are a stopgap solution that does not meet the requirements of modern brand communication or user expectations.
If you want professional, consistent, and visually appealing signatures, there is no way around specialized solutions.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
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DeleteScriptCreatedSignaturesWithoutTemplate and DeleteUserCreatedSignatures.
Designing signatures with limited space just got easier. We have introduced shorter replacement variable names that can be used interchangeably with the original long names. This applies to both default and custom variables.
$UVariableX$)$UMVariableX$)$MVariableX$)$MMVariableX$)Set-OutlookSignatures now provides improved proactive warnings to identify potential misconfigurations or environment constraints:
DisableRoamingSignatures.The Benefactor Circle add-on and Outlook add-in receive several key enhancements for advanced deployments:
DeleteScriptCreatedSignaturesWithoutTemplate parameter is now more aggressive in removing "leftover" signatures when toggling roaming signature settings.For a comprehensive list of all changes, dependencies, and fixes, please consult the official changelog.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
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]]>My name is Jiří Hrabák, I am an ICT Senior Consultant at AIMTEC a. s.. AIMTEC provides digitalisation, automation, and IT solutions—covering systems like SAP, advanced planning, and end-to-end logistics management.
I'm excited to share how we've implemented a robust, automated, and dynamic signature management solution using Azure DevOps Pipelines to work seamlessly with Set-OutlookSignatures.
We’ve automated the generation and deployment of user signatures and the Outlook Add-in, ensuring consistency and up-to-date information across our organization, all driven by user attributes in Active Directory/Entra ID.
Our solution relies on a well-structured setup involving three Git repositories and Azure cloud services.
The pipeline handles deployment using environment-specific variables defined in the azure-static-aimoutlooksignatures variable group:
variables:
- $:
- name: targetEnvironment
value: 'Production'
- $:
- name: targetEnvironment
value: 'Development'
The real power of our setup comes from the automated signature generation pipeline, which is triggered automatically based on user changes in our HR system.
Our Human Resources Management (HRM) system updates user attributes in Active Directory/Entra ID.
We use Extension attribute 1 as a trigger: If this attribute is updated from 0 to 1, the pipeline is triggered for that specific user.
The template generator pipeline uses a parameterized approach to define the target user (UPN) and the signature template version.
- name: UPN
type: object
default: ['xx@yy', 'xx@yy']
- name: version
type: string
default: '4.23.0'
The core steps within the job use the powerful SimulateAndDeploy feature:
Add-MailboxPermission -Identity $email -User "signature-service@example.com" -AccessRights "fullaccess" -Confirm:$false
$SimulateAndDeployParams = @{
# Define parameters here
}
& ./Set-OutlookSignatures_v$version/sample code/SimulateAndDeploy.ps1 @SimulateAndDeployParams
Remove temporary permissions
Immediately after deployment, the temporary Full Access permission is revoked for security, and the extension attribute is reset.
Remove-MailboxPermission -Identity $email -User "signature-service@example.com" -AccessRights FullAccess -Confirm:$false
Set-Mailbox -Identity $email -CustomAttribute1 $null
The decision to use the Outlook add-in, which is hosted on an Azure Static Web App, is based on two key technical advantages:
The add-in manifest is deployed via the pipeline to the Azure Static Web App, using the free tier.
- task: AzureStaticWebApp@0
inputs:
azure_static_web_apps_api_token: $(deploy-token)
# ...
workingDirectory: "$(Pipeline.Workspace)/manifest"
skip_app_build: true # boolean. Skip app build.
skip_api_build: true # boolean. Skip api build.
app_location: "/" # App source code path
# ...
deployment_environment: "$(targetEnvironment)"
This dynamic, attribute-driven approach provides a reliable, code-centric solution for signature management, ensuring our signatures are consistent and up-to-date with minimal manual intervention.
Jiří Hrabák, ICT Senior Consultant, AIMTEC a. s.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
Around 2.4% of adults worldwide use screen readers due to visual impairment.
Accessibility benefits approximately 1.3 billion people with disabilities, plus their families and caregivers.
But accessability is an ubiquitous demand that is not bound to a permanent disablity. In fact, we all are in situations quite often in which barrier-free emails are easier to read:
Clear, accessible emails help all users: improved readability, quicker engagement, better compliance.
But the reality is different: In 2024, out of 4.26 billion email users worldwide, 99.97% of emails tested contained issues impacting accessibility.
That’s why every sample template in Set-OutlookSignatures is designed with accessibility in mind.
And you can easily make your own signatures barrier-free, without having to sacrifice your design:
A simple step toward a more inclusive digital world!
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
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Data sources used for this post: beaccessible.com, allaccessible.org
]]>Adding user photos to your DOCX signature templates is now significantly simpler.
You can now insert an account picture by simply adding a shape to your DOCX template, positioning it "inline with text," and setting the picture replacement variable (e.g., '$CurrentUserPhoto$') in the shape's alternative text. The script automatically populates the shape with the user's photo.
Set-OutlookSignatures now provides improved proactive warnings to identify potential misconfigurations in your directory that could lead to signature errors.
The script will warn you if a mailbox lacks the 'mail' attribute, if the 'mail' attribute doesn't match the primary SMTP address, or if multiple primary SMTP addresses are defined.
These checks help ensure reliable operation of signature deployment and other Microsoft applications.
Several updates were made to ensure robust performance across various environments:
The Outlook add-in receives key enhancements for advanced deployments:
For a comprehensive list of all changes, dependencies, and fixes, please consult the official CHANGELOG.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
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With the advent of computers, encoding became a technical challenge. Characters had to be translated into bytes, resulting in over 140 different character encodings that modern operating systems and frameworks still support today. ASCII, ISO-8859, Windows-1252, Shift-JIS—each encoding has its own characteristics and limitations.
Unicode was and is a milestone: A system designed to represent (nearly) all characters in all languages. Unfortunately, even Unicode is not a universal solution. It exists in several variants (UTF-8, UTF-16, UTF-32), with and without BOM, and with partially incompatible implementations.
HTML makes it even more complicated by distinguishing between internal encoding and external encoding.
The free and open-source PowerShell function ConvertEncoding, part of Set-OutlookSignatures, makes the powerful and also free and open-source library UTF.Unknown really easy to use.
ConvertEncoding enables reliable detection of encodings via BOMs, HTML metadata, and heuristic analysis, and converts content to other formats as needed. Even HTML files are correctly adjusted, including meta tags. This makes different encodings easy to manage.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
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Let's rewind to the 1980s. Back then, Microsoft Xenix was the leading Unix OS - yes, really! - and Microsoft itself was running its own mail system on it. This system had a feature to notify others when someone was unavailable, marked as Out Of Facility (OOF).
Over time, "Out Of Facility" evolved into "Out Of Office", but the abbreviation OOF stuck.
Why? Probably because it's easier to pronounce than "OOO".
Out-of-Office messages are often the first thing people see when you're unavailable, which makes them more important than many realize.
A clear and professional OOF message helps:
Here are a few simple templates you can use:
Simple and clear
Thank you for your message. I am currently out of the office and will return on [date]. I will respond as soon as possible after my return.
With alternative contact
I am out of the office until [date]. For urgent matters, please contact [colleague name] at [email].
More personal tone
I'm currently out of the office taking a short break and will be back on [date]. Thanks for your patience!
This is a reference to the keyboard shortcuts in Outlook, which in turn were adopted from the Unix mail system mentioned above.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
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Sometimes, you want to deploy a signature only once, allow the user to personalize it, and never overwrite it again.
There are three ways to achive this with Set-OutlookSignatures:
Tie a template to a custom replacement variable
Define a signature template in your INI file and use a custom replacement variable to control deployment.
Your custom code checks if the signature already exists - if it does, it sets the custom variable to false and stops deployment.
Use the VirtualMailboxConfigFile parameter that comes with the Benefactor Circle add-on
This advanced method defines the signature configuration entirely in code, not in the INI file.
Your custom code can include conditional logic based on group membership, user attributes and more.
The clever alternative: Deploy a reference signature users can copy and modify
This is the most popular approach among our customers. Instead of enforcing a one-time deployment, you provide an always up-to-date reference signature. Users can copy it, personalize it, and use it as their own.
It's not technically a one-time deployment, but it's a clever, user-friendly alternative that balances consistency with flexibility.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
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The code is, of course, full of stuff related to getting reliable information about the current user and its manager from different sources, reading and interpreting the Outlook configuration from the registry, and automating Word for document manipulation. Thanks to open-source, you can have a look at it and actively help make it better.
Beside the big learning topics mentioned in the FAQ, the main and support files of Set-OutlookSignatures are sprinkled with small code snippets and comments you may find useful. Chances are good that you will stumble across some small gems of code by just browsing through it.
The following gives you an overview which other scripting techniques you can learn from Set-OutlookSignatures.
You have found some lines of code that you can use for yourself? Great, that's exactly how it's meant to be. My pleasure!
One small ask: If you have a minute, please let me know which part of the code you were able to reuse.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
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When Microsoft announced roaming signatures back in 2020, it sounded like a game-changer. No more local signature storage. A consistent experience across devices. And finally, a solution to the one-signature limitation in on-prem Outlook for the web.
That was the theory.
Fast forward to mid-2025, and while most tenants now have roaming signatures enabled, the reality is more complicated:
At Set-OutlookSignatures and ExplicIT, we're convinced that roaming signatures are the future. But Microsoft's slow rollout and limited communication have made adoption tricky. That's why we've invested heavily in supporting this feature within Set-OutlookSignatures - offering capabilities no other solution on the market can match.
Our recommendation for most clients:
If you cannot or do not want to run Set-OutlookSignatures on your clients, distribute signatures from a central location using ‘SimulateAndDeploy’.
Today, it's a pain point, often requiring expensive server-side rerouting just to apply a signature. But once Microsoft releases an official API, that changes.
In the meantime, the Outlook add-in, part of the Benefactor Circle add-on, closes this gap - and more - not only for Android and iOS but for all platforms Outlook supports.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
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Set-OutlookSignatures v4.23.0 is here, delivering a major upgrade focused on two common - and surprisingly complex - pain points in global IT: Perfectly formatting phone numbers and postal addresses.
This release integrates world-class open-source libraries to ensure your organization's contact information is globally correct and consistently professional in every signature.
We think phone numbers are easy because we assume they are just numbers and forget about global complexity. If you still think so, reading the article 'Falsehoods Programmers Believe About Phone Numbers' will change your mind.
We've added a new phone number formatter based on Google's libphonenumber library.
This feature converts raw numbers (and an optional country code) into standardized formats:
tel: links.New replacement variables, such as $CurrentUserTelephone-International$ and $CurrentMailboxManagerMobile-RFC3966$, are now available.
For implementation details, see our Format Phone Numbers FAQ.
Just like phone numbers, postal addresses seem like child's play - if you're only working nationally. However, "Different countries, different customs". Read the article 'Falsehoods programmers believe about addresses' to understand the global chaos we've tamed.
A new Address Formatter module, based on OpenCage GmbH's work, ensures addresses are assembled according to country-specific rules.
Input named address components (over 20 available) and the country code to output the correctly formatted string via the new $Current[User|UserManager|Mailbox|MailboxManager]PostalAddress$ variables. A necessity for multinational companies.
For implementation details, see our Format Postal Addresses FAQ.
For a comprehensive list of all changes, dependencies, and fixes, please consult the official CHANGELOG.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
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Rotating them manually across your team's signatures is nearly impossible and definitely not scalable.
With Set-OutlookSignatures, you can automate banner rotation effortlessly, using flexible conditions tailored to your needs.
Whether you want to:
It's all possible and easy to implement.
$CurrentMailbox_Banner1DELETEEMPTY$ for banner 1, $CurrentMailbox_Banner2DELETEEMPTY$ for banner 2, and so on.Create a custom replacement variable for each banner in your replacement variable config file, and randomly only assign one of these variables a value: ``` $tempBannerIdentifiers = @(1, 2, 3)
$tempBannerIdentifiers | Foreach-Object {
$ReplaceHash["CurrentMailbox_Banner$($_)"] = $null
}
$ReplaceHash["CurrentMailbox_Banner$($tempBannerIdentifiers | Get-Random)"] = $true
```
Now, with every run of Set-OutlookSignatures, a different random banner from the template is chosen and the other banners are deleted.
You can enhance this even further:
$tempBannerIdentifiers = @(1, 1, 2, 3)Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
This is often the case with Microsoft 365 F licenses or Bring-Your-Own-Device (BYOD) setups.
That's where Set-OutlookSignatures steps in—with a powerful built-in feature: SimulateAndDeploy
With SimulateAndDeploy, you can roll out email signatures and out-of-office replies:
It's the world's first and only solution that makes this level of deployment possible.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
…but when left unchanged, it can become a ghost of missed opportunities.
This spooky season, turn your sign-off into a spellbinding marketing tool. With Set-OutlookSignatures, you can conjure up time-based, seasonal, and campaign-driven signatures that rotate like magic. No broomstick required.
Schedule templates for:
Just create your template, assign it to selected or all mailboxes, and define when it should appear.
No tricks, just treats for your brand visibility.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
Most solutions lock you into a proprietary HTML editor. But at Set-OutlookSignatures, we believe in giving you the freedom to choose.
That's why we support both HTML and DOCX templates, because flexibility should never be a compromise.
So why do most of our clients choose DOCX?
Let's be honest: Word isn't a perfect HTML editor. But with Set-OutlookSignatures, it becomes a powerful, user-friendly design tool, backed by logic that keeps your emails looking sharp everywhere.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
Do you have users accessing Exchange Online mailboxes with Outlook for Mac? Then you'll want to hear this.
With Set-OutlookSignatures and the Benefactor Circle add-on, you can centrally manage and deploy email signatures and out-of-office replies, also for Outlook for Mac.
Here's the catch: Classic and New Outlook for Mac only support locally stored signatures. That means no roaming, no consistency, and no control.
Enter the Benefactor Circle add-on:
Because email signatures aren't just a sign-off, they're part of your brand, your compliance strategy, and your communication culture.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
The v4.22.0 release brings major changes and customization features to the Outlook add-in:
customRulesResultSignatureBody property, available for Exchange Online.graphAccessToken and graphApiEndpoint properties to custom rules, allowing direct querying of the Graph API for advanced logic (e.g., user properties, group membership).customRulesResultNotification variable.customRulesProperties.notificationCurrent and customRulesProperties.notificationOriginal.customRulesProperties.itemIsReplycustomRulesProperties.itemIsForwardcustomRulesProperties.itemIsHtmlcustomRulesProperties.itemIsTextcustomRulesPropertiesResult to the clearer customRulesResultSignatureName.itemIsNew and itemIsReplyForward report correctly across platforms.customRulesPropertiesResult between manual and automatic runs.manifest.xml to clarify mailbox requirements and permissions.For a comprehensive list of all changes, dependencies, and fixes, please consult the official CHANGELOG.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
You want to assign signatures to mailboxes or distribution lists that users don't add to Outlook, but use by selecting a different "From" address with Send As or Send on Behalf rights?
With Set-OutlookSignatures, this is straightforward when you follow Microsoft's best practices for permissions:
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
New launch events and custom code support:
See .\sample code\CustomRulesCode.js in the Outlook add-in folder for details.
For a comprehensive list of all changes, dependencies, and fixes, please consult the official CHANGELOG.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
For a comprehensive list of all changes, dependencies, and fixes, please consult the official CHANGELOG.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
But the numbers tell a different story.
Let's break it down:
That's EUR 8.04 per user per year spent on manual signature updates alone.
Now compare that to Set-OutlookSignatures:
And the benefits go beyond cost savings:
Set-OutlookSignatures pays for itself and helps you unlock new value from every message.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
For a comprehensive list of all changes, dependencies, and fixes, please consult the official CHANGELOG.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
Here's what's going on: By default, Outlook uses black text for new emails and blue text for replies and forwards. These defaults also apply to signatures - sometimes by design, sometimes by surprise.
There are two key factors at play: 1️⃣ Outlook's default formatting: You can configure default text colors for new messages and replies/forwards via Outlook settings, registry keys, or Group Policy.
2️⃣ The hidden twist: 'Automatic' text color: When designing signatures in Word or Outlook, you might unknowingly apply a color called 'Automatic'. It looks like black, but it's not.
And here's the kicker: Some Outlook versions struggle to interpret 'Automatic' correctly, especially when switching signatures mid-draft or using the preview pane.
With Set-OutlookSignatures, you can standardize signature formatting across your organization. No surprises, no color shifts, just consistent branding.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
Microsoft no longer allows '@' in roaming signature names as it is reserved for internal use, and Microsoft Outlook will follow soon.
This hotfix addresses this change as follws:
| Add '@' to the list of invalid characters for signatures names as documented in sample INI files. The new complete list of invalid characters is '\/:"*?><, | @'. |
For a comprehensive list of all changes, dependencies, and fixes, please consult the official CHANGELOG.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
This hotfix resolves issues with the parameters DeleteScriptCreatedSignaturesWithoutTemplate and DeleteUserCreatedSignatures.
While DeleteScriptCreatedSignaturesWithoutTemplate did not delete obsolete signatures, the same error in the code caused DeleteUserCreatedSignatures (disabled by default) to delete even non-user signatures.
A comprehensive list of all changes, dependencies, and bug fixes can be found in the official CHANGELOG.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.
The need for cross-tenant mailbox access—whether for a merger, acquisition, or complex organization—breaks most traditional signature solutions. Why? Because their architecture simply can't handle it. Set-OutlookSignatures solves this. Rleease v4.20.0 introduces full cross-tenant support that works seamlessly.
Ever since IT came into existence, encoding has been a necessary but annoying topic. Modern systems can handle around 140 different encodings. Unicode is not a universal solution, as at least six different variants are used.
Set-OutlookSignatures now comes bundled with UTF.Unknown for encoding detection. A ready-to-reuse function not only makes encoding detection a breeze, but also encoding conversion, and even takes into consideration HTML specifics.
For a comprehensive list of all changes, dependencies, and fixes, please consult the official CHANGELOG.
Email signatures and out-of-office replies may seem minor, but think about how often people see them.
We help organizations centrally manage and standardize these touchpoints across all users — unified Outlook branding everywhere, with zero external data exposure. No manual effort, no inconsistencies, no data leaving your environment. With Set-OutlookSignatures, every email becomes a consistent, secure, and fully controlled brand experience.
👉 See what’s possible for your email setup
→ See how it works (2 min)
👉 Want to try it yourself?
→ Quickstart
Not responsible for email setup in your company?
Share this page with your IT department or marketing team, they’ll thank you for it.