New release v4.22.0

2025-09-05

🔗More Outlook add-in customization

The v4.22.0 release brings major changes and customization features to the Outlook add-in:

• Custom rules can now set a completely customized signature body using the new customRulesResultSignatureBody property, available for Exchange Online.
• Added graphAccessToken and graphApiEndpoint properties to custom rules, allowing direct querying of the Graph API for advanced logic (e.g., user properties, group membership).
• The text of the post-signature notification can be set using the new customRulesResultNotification variable.
• Custom rules can access the current and original notification texts via customRulesProperties.notificationCurrent and customRulesProperties.notificationOriginal.
• New boolean properties are available for custom rules to check email context:
  • customRulesProperties.itemIsReply
  • customRulesProperties.itemIsForward
  • customRulesProperties.itemIsHtml
  • customRulesProperties.itemIsText
• Added the ability to define a custom ID for the add-in, enabling multiple independent configurations in the same environment.

🔗Further updates

• Added a workaround for the issue in Outlook for the web and New Outlook for Windows that resulted in multiple signatures being added to appointments.
• The add-in is now forced to use the Graph API for Exchange Online mailboxes to prepare for the deprecation of EWS.
• Changed the custom rules output variable from customRulesPropertiesResult to the clearer customRulesResultSignatureName.
• Fixed an issue to ensure custom rules properties itemIsNew and itemIsReplyForward report correctly across platforms.
• Fixed an issue to prevent the add-in from re-using customRulesPropertiesResult between manual and automatic runs.
• Added comments to the manifest.xml to clarify mailbox requirements and permissions.

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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