The Benefactor Circle add-on

🔗Think Outlook branding further – across every platform

The Benefactor Circle add-on enhances the free and open-source Set-OutlookSignatures with great additional possibilities for your company.

📱

Cross-Platform Automation
Signatures are automatically deployed across all Classic and New editions of Outlook: Windows, macOS, iOS, Android, and Web.

📅

Time-Controlled Marketing Campaigns
Schedule signatures to start, change, and expire automatically - with crisp banners and images directly from Word templates.

🎯

Centralized Deployment
Set signatures from a central location without software on each individual device. Ideal for BYOD scenarios and users with M365 F licenses.

👥

Shared Mailboxes and Delegation Scenarios
Full control over signatures for shared mailboxes and in delegation scenarios (e.g., secretarial or substitute staff).

🏝️

Out-Of-Office Replies
Manage and distribute OOF messages consistently and centrally from one location.

🧹

Automated Signature Cleanup
Outdated or manually created signatures are automatically removed to ensure a consistent corporate design.

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Support for Third-Party Clients
Signatures are also available in alternative email programs such as Apple Mail, Gmail, or Thunderbird via a draft email that is always up to date.

💎

Complete White Labeling
Exclusive brand appearance by removing the "Free and open-source Set-OutlookSignatures" tagline from your signatures.

Security-conscious and brand-aware organizations worldwide trust our solution — for Microsoft 365 Commercial as well as national and sovereign cloud environments like GCC, GCC High, DoD, China, Bleu, and Delos.

🔗Updates and support

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All Updates Included
Regardless of whether it is a patch, new feature or even a new major version.

🎧

Prioritized Support Requests
24/5 on Austrian working days, by email and with callback option.

🛡️

Secure Data Exchange
Upload log files via a secure portal instead of sending them by email or publishing them on GitHub.

Get a trial license or request a quote

🔗See it in Action

Organizations use our ecosystem to enforce dynamic branding, administrative governance, and cross-platform data sovereignty — all without changing how users work.

⚡

Set-OutlookSignatures

Free, open-source core

Best for technical evaluation and organizations using Classic Outlook for Windows. Start with a mature, peer-reviewable foundation, explore its comprehensive feature set, or learn from the source code.

Centralized signature management
Classic Outlook for Windows
Simulation mode for risk-free technical evaluation
Exchange on-premises, hybrid, and all Microsoft 365 clouds

Signatures in Minutes: 3-Step Quickstart

For IT administrators. No signup required.

⭐

Benefactor Circle add-on

Commercial extension with the same data-sovereign architecture

Best for organizations that need centrally governed signatures and out-of-office replies across every Outlook platform, with advanced capabilities for IT, Marketing, and Security.

Classic and New Outlook on Windows, Mac, Web, iOS, and Android
Time-controlled marketing campaigns with scheduled banners and content
Centrally managed out-of-office replies
Support for shared mailboxes, delegates, BYOD, F-license scenarios, and more: Explore all features
Lower total cost than competing products and even manual updates

Schedule a Tailored Demo

For decision-makers in IT, Marketing, and Security.

🔗Free trial

After setting up the free and open-source Set-OutlookSignatures using the Quickstart guide and configuring it to your needs, you are ready to take the next step:

Trial licenses are limited to 14 days runtime, a maximum of 20 mailboxes, and cannot be extended or re-issued.

The trial period starts when we create and submit the trial version, not with you using it for the first time (that's not possible as our software does not phone home).

Get a 14-day trial license

🔗Buy licenses

Upgrading to the full version, adding more mailboxes and renewing a license is quick and straightforward:

You will receive a quote shortly. You double-check it, we send the invoice and you can start the payment process.

We send you the download and usage instructions for your new license as soon as we receive the full invoice amount.

Request a license quote

🔗Price and business case

Set-OutlookSignatures is and will always be free and open-source. What began as a technology demonstrator has evolved into the most advanced, secure, versatile and data protection friendly tool for managing Outlook email signatures. Learn more about the story behind the code.

The Benefactor Circle add-on unlocks advanced features for just € 0.26 per mailbox/month, equivalent to € 3.12 per year. Billed annually, no auto-renewal.

The add-on is an investment that pays off from day one, certainly for you as well.

Mailboxes (1 year) Buy any amount	Manual updates Modify parameters	Set-OutlookSignatures
	Average values per user and year € Total cost of employment ⓘ Total annual cost for an employee from the employer's perspective. Calculation of the annual salary From the employee's perspective Statistik Austria Section "Detailergebnisse", document "Bruttojahreseinkommen der unselbständig Erwerbstätigen". Calculate the average arithmetic mean for the columns "Angestellte", "Vertragsbedienstete", and "Beamte". This value is from the employee's perspective, so it does not yet include employer costs. From the employer's perspective BMF Berechnungsprogramme "Brutto-Netto-Rechner". Set "Einkommen" to the calculated average value from above, select "Jährlich" and "Brutto". Select the year that corresponds to the statistics. Switch to the "Dienstgeber" tab and take the value from the "Gesamtsumme" row and "Jahr" column. Other variable costs include work equipment, licenses, infrastructure and overhead shares, overtime, and bonuses. / hours Working hours ⓘ Actual working hours performed per year, i.e., excluding absences such as public holidays, vacation, and sick leave. Calculation Statistik Austria Section "Detailergebnisse", document "Detailtabellen zu Arbeitszeit, Arbeitsvolumen, Überstunden - Zeitreihen", tab "AZ3" ("Durchschnittliche tatsächlich geleistete Arbeitsstunden nach beruflicher Stellung"). Calculate the average arithmetic mean for "Angestellte" und "Öffentlich Bedienstete". Multiply this weekly hours value by 52 weeks to obtain the working hours per year. = €/minute Cost per working minute * signatures Desired number of signatures ⓘ How many signatures would you need per user if manual updates weren't a constraint? * changes Desired number of signature updates ⓘ How many signature updates would you make if manual updates weren't a constraint? * minutes Minutes required per update ⓘ Time a user spends reading instructions, copying templates, entering variable values, and verifying the result. * devices Devices per user ⓘ Include smartphones, tablets, VDIs, terminal server sessions, and personal (BYOD) devices. = € Cost of manual signature management This simple and conservative calculation does not consider: Shared mailboxes, out-of-office replies, outdated contact data, compliance risks, brand damage, and the marketing value of every outgoing email.
mailboxes		🟢 € 0
50 mailboxes		🟢 € 0
100 mailboxes		🟢 € 0
500 mailboxes		🟢 € 0
1000 mailboxes		🟢 € 0
5000 mailboxes		🟢 € 0
10000 mailboxes		🟢 € 0

When evaluating email signature management solutions, consider the total cost of ownership over several years. Some competitors include automatic annual price increases of 8% or more in the fine print.

Click here for MSP and IT service provider details

The Benefactor Circle add-on has no reseller tiers, no hidden discount structure, and no mandatory partner program.

MSPs and IT service providers can purchase licenses at the standard price, define their own managed service offering, and charge customers for implementation, operation, consulting, and support under their own commercial terms.

This gives you full flexibility over your service scope, pricing model, and customer margin.

Click here for information about direct procurement without public tender

Due to its unique technical characteristics and exclusive manufacturer availability, the Benefactor Circle add-on may meet the conditions for direct procurement or a negotiated procedure without prior publication, where this is permitted by applicable procurement law.

If a direct award is not possible in your case, your procurement department is welcome to contact us. We are happy to provide the technical and commercial background needed to assess the appropriate procurement path.

Click for details about handling via external procurement service providers (procurement outsourcers)

Our pricing for the Benefactor Circle add-on is based on efficient, direct procurement processes. As a general rule, collaboration with external procurement service providers also runs smoothly.

At the same time, our long-standing project experience shows that certain procurement models or configurations with specific external service providers systematically lead to redundant administrative overhead. This typically manifests as up to an 8-fold increase in communication effort and up to a 2.5-fold increase in processing turnaround times.

Since these effects have occurred consistently over the years — independent of project content or complexity — while producing completely identical professional results and delivered artifacts across all phases, they are classified as purely structural and process-related.

To ensure transparency, predictability, and a fair allocation of costs based on causation, a flat processing fee equal to one man-day will be charged per procurement transaction in these configurations, in accordance with our Professional Support Terms. This regulation represents a standardized treatment of the corresponding procurement scenarios and applies regardless of the actual effort involved in individual cases.

Alternative procurement channels (such as direct purchasing) as well as collaboration with procurement service providers that did not cause these effects in the past remain unaffected by this regulation.

🔗License details

What to license: Any mailbox using Benefactor Circle features requires a license, whether it's a user, shared, or resource mailbox.
What’s unlimited: There are no limits on the number of users accessing a licensed mailbox, templates, deployed signatures, instances, or configurations.
How it works: You do not register individual mailboxes with us. Instead, simply provide an Active Directory or Entra ID group containing your target mailboxes, and set the maximum number of recursive members. You manage the actual license assignment entirely within your own directory. See 'How license groups work' for details.
Terms: Licenses are billed annually in advance. There is no minimum mailbox count, though each invoice must meet a minimum net amount of € 210.00.
No auto-renewal: We will send you a quote six weeks before your license expires.
Scaling: Adding mailboxes mid-term is prorated for the remaining months of your current term (subject to the minimum invoice amount).
Upgrades and support: Active licenses include free version upgrades. Technical support is not included and must be purchased separately. However, support is 100% free if the issue is due to a bug in our current software or documentation, and support cases for Benefactor Circle customers are always prioritized. See 'Get support and contact us' for details.

🔗How license groups work

Each Benefactor Circle license is bound to an Active Directory or Entra ID group, called a license group, with a defined maximum number of members. For data protection reasons and ease of administration, licensing is not bound to specific mailboxes ("named users"), but only to a group with a maximum amount of members.

For most environments, only one license group is needed. If you want to define multiple groups, one license group per Active Directory DNS domain or Entra ID tenant is allowed.

A license group definition consists of three components:

The Active Directory DNS domain name or the Entra ID tenant of the license group's home.
For cloud-only groups, use EntraID_<Tenant ID> or EntraID_<Tenant DNS Domain>.
Examples: corp.example.com, EntraID_example.com
The Active Directory SID (security identifier) or the Entra ID object ID of the license group, depending on the license group's home.
Examples: S-1-5-21-2998092229-1459889137-3613942852-2617, f3f0611a-7bbe-4717-89c3-b967caf6922a
The maximum number of mailboxes licensed for the group.
Examples: 478, 16000

The example values given above result in the following license groups:

The Active Directory group corp.example.com, S-1-5-21-2998092229-1459889137-3613942852-2617, 478
The Entra ID group EntraID_example.net, f3f0611a-7bbe-4717-89c3-b967caf6922a, 16000

Where should I create the license group?

When using the -GraphOnly true parameter, create the group in Entra ID: EntraID_<Tenant DNS Domain>, <Entra ID object ID of the license group>, <Number Of Licenses>
You may also use a group created in on-prem Active Directory, as long as it is synchronized to Entra ID: <Active Directory DNS domain name>, <SID of the license group>, <Number Of Licenses>
In hybrid environments with mailboxes on-prem and in the cloud, and without using the -GraphOnly true parameter, create a group in your Active Directory and make sure it is synchronized with Entra ID: <Active Directory DNS domain name>, <SID of the license group>, <Number Of Licenses>
You can also use a group created in Entra ID: EntraID_<Tenant DNS Domain>, <Entra ID object ID of the license group>, <Number Of Licenses> (which equals using the -GraphOnly true parameter)
In pure on-prem environments, you can only use on-prem groups: <Active Directory DNS domain name>, <SID of the license group>, <Number Of Licenses>
When moving to a hybrid environment, you do not need to adapt the configuration as long as you synchronize your on-prem groups to Entra ID.

When a Benefactor Circle exclusive feature is about to be used, the license is checked as follows:

Determine which license group to use.
1. Extract the AD DNS domain name from the mailbox's distinguishedName or dnsDomainName property.
2. Use the first license group associated with this AD DNS domain name.
  If no license group for this AD DNS domain is defined and the Mailbox is in Exchange Online, use the first Entra ID license group associated with the tenant of the mailbox.
  Finally, if no matching license group is defined, use the first license group in the list.
Find the license group via a Graph or Active Directory query.
Check if the number of direct and indirect (a.k.a. nested, recursive, transitive) members is less than or equal to the number of mailboxes licensed for this group.
Check if the current mailbox is a member of the license group.

If any of these steps fails, the mailbox is not licensed and Benefactor Circle features cannot be used for it.

Increasing the number of licensed mailboxes

Adding mailboxes mid-term is prorated for the remaining months (minimum invoice amount applies).

Moving licensed mailboxes between license groups

Moving licenses means that the total number of licensed mailboxes does not change, but their distribution across license groups. This can, for example, be necessary due to Active Directory consolidations.

Shifting licenses between license groups is possible once per license period. If more license shifts are required, additional licenses have to be acquired temporarily, the total number of licenses can then be reduced when the new license period begins.