New release v4.21.0

New features for the Outlook add-in

2025-08-15

🔗New features for the Outlook add-in

New launch events and custom code support:

  • React to launch events OnMessageRecipientsChanged and OnAppointmentAttendeesChanged.
  • Allow adding custom code to the add-in so you can directly influence which signature it will set.
    For example, you can set a specific signature…
    • …when there are only internal recipients, or another signature when there are external recipients
    • …depending on the from email address
    • …when a specific customer is in the To field
    • …when the current item is a mail or an appointment
    • …when the current item is a new mail, or another signature when it is a reply or a forward
    • …depending on the subject
    • …or any other condition derived from the information available in the customRulesProperties object

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.

🔗Interested in learning more or seeing our solution in action?

Contact us or explore further on our website. We look forward to getting to know you!

new release

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...