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.

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