New hotfix release v4.20.4

Addressing changes in Microsofts roaming signatures API

2025-08-12

🔗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 response status code for https://localhost:444/owa/service.svc?action=SanitizeHtml action \u0027SanitizeHtml\u0027 is InternalServerError. ReasonPhrase:Internal Server Error'.
  • Add hints about probable root causes of empty signatures lists in the log output of the Outlook add-in.

For a comprehensive list of all changes, dependencies, and fixes, please consult the official CHANGELOG.

🔗Set-OutlookSignatures centralizes email signatures and out-of-office replies across every Outlook platform

Consistent branding for Marketing, centralized control for IT, and zero manual effort for employees. Sovereign by design, it keeps data within systems you already trust.

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new release

 

2026-09-30

🔗 Self-service email signature attributes with data sovereignty

Let users personalize email signatures while IT retains control and all data stays inside systems your organization already trusts.

2026-09-23

🔗 From Halloween to the Holidays: Automate Seasonal Email Signatures 🎃🍂🎄

Halloween is just the beginning. Use scheduled email signatures to promote autumn events, year-end campaigns, holiday offers, and seasonal greetings automatically across Outlook.

2026-09-15

🔗 HTML or DOCX templates?

The choice of signature template determines how easy templates are to maintain.