Master Outlook signatures

Tips, tools, and trends for IT and marketing teams

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...

2025-06-26

🔗 New hotfix release v4.20.1

Corrections for cleaning up signatures

Corrections for cleaning up signatures

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...

2025-06-18

🔗 New release v4.20.0

Cross-tenant access and Multitenant Organizations

Cross-tenant access and Multitenant Organizations

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.

Encoding detection

Ever since IT came into existence,...

2026-05-19

🔗 Goodbye Rollout Panic: How to Test Outlook Signatures & Out-of-Office Notes Without Accessing Live Mailboxes

Worried about broken templates or overwriting VIP replies? Discover how to use simulation mode to validate signature and OOF logic against real data with zero risk to end users.

How do you test signature and OOF changes without risking mishaps? 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...

2026-05-06

🔗 Out-of-office replies or autoresponder rules: Which is the better choice?

At first glance, the choice seems obvious. But on closer inspection, important differences emerge that may change your perspective.

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...

2026-05-01

🔗 Set-OutlookSignatures v4.27.0: Configure faster with the new INI Editor and ship with stronger diagnostics

Set-OutlookSignatures v4.27.0 introduces a new graphical INI editor, improved Entra ID permission guidance, and practical runtime diagnostics for power mode and battery. The Benefactor Circle add-on and Outlook add-in also gain important robustness improvements, especially for multi-mailbox scenarios and cloud hosting detection.

Set-OutlookSignatures v4.27.0 is a productivity and reliability release. It makes configuration work easier for IT and Marketing teams, improves security posture by tightening Entra ID permission visibility, and adds diagnostics that help explain slow runs in the real world.

Plan ahead: EWS is being turned off for Exchange Online

Microsoft...