Master Outlook signatures

Tips, tools, and trends for IT and marketing teams

2025-08-12

🔗 New hotfix release v4.20.4

Addressing changes in Microsofts roaming signatures API

Addressing changes in Microsofts roaming signatures API

Add workaround for Microsoft internal problems with roaming signatures API, which would result in the following error when uploading roaming signatures to mailboxes which are not the one of the logged-on user (especially in SimulateAndDeploy mode). The log would contain the error 'The...

2025-08-11

🔗 Centralized signature management: Cost center or opportunity?

Many assume that managing email signatures only makes sense for large enterprises

Many assume that managing email signatures only makes sense for large enterprises

But the numbers tell a different story.

Let's break it down:

Average employee cost: EUR 0.55 per minute (based on EUR 60,000 per year for 1,800 hours) 1 device, 2 signatures 2 updates per year 3 minutes per...

2025-07-17

🔗 New hotfix release v4.20.3

Fixes for PowerShell quirks and SimulateAndDeploy

Fixes for PowerShell quirks and SimulateAndDeploy

Add a workaround for PowerShell 5.1 not correctly converting arrays to JSON when passing them via the InputObject parameter. (#136) Fix Set-OutlookSignatures quitting with exit code 14 when using it in SimulateAndDeploy mode for Exchange Online. Add a workaround for PowerShell not reliably resolving...

2025-07-15

🔗 Why does text sometimes turn blue instead of staying black?

Ever noticed your email signature text mysteriously changing color, especially in replies or forwards?

Ever noticed your email signature text mysteriously changing color, especially in replies or forwards?

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...

2025-07-08

🔗 New hotfix release v4.20.2

Update handling of the '@' character in signatures names

Update handling of the '@' character in signatures names

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...

2026-04-22

🔗 Designing signatures for dark mode

The shift to Dark Mode has dramatically improved screen comfort for millions, but it’s introduced a major headache for email signature designers.

The shift to Dark Mode has dramatically improved screen comfort for millions, but it’s introduced a major headache for email signature designers. While most of your email templates might handle color swaps gracefully, the precision of a professional email signature is often ruined by inconsistent mail client rendering.

If you’re...

2026-04-15

🔗 Still using VBS scripts to deploy email signatures? Level up now!

VBScript is officially deprecated by Microsoft. Don't just rewrite your code—modernize your entire signature deployment strategy with a future-proof framework.

VBScript has been officially marked as deprecated by Microsoft. It’s no longer a question of if your legacy signature scripts will stop working, but when.

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...

2026-04-08

🔗 Custom attributes and calculated data in email signatures

Most of the information used in email signatures comes directly from your directory service. But what about the data that doesn’t have a predefined field?

Most of the data that appears in email signatures is already available in your directory service. First and last names, job titles, phone numbers, office locations, company names, and even reporting lines are typically part of Exchange, Active Directory, or Entra ID by default.

That works well as long as...