User impact: Users may be unable to access the default add-ins in Outlook.

More info: This issue impacts both the Outlook desktop client and Outlook on the web. Some affected users find that the “My Templates” icon is missing from the Outlook ribbon and others may be unable to find templates in the AppData Microsoft Templates location, even though templates are known to exist and may still be being used by non-impacted users. Some users also report that the Viva Insights add-in is also impacted by this event.

Current status: Our analysis of internal system logs and service data is ongoing as we work to trace the underlying source of impact and determine our next steps. In parallel, we’re reviewing recent updates and changes to the service to identify whether any may be contributing to impact.

Scope of impact: Some users attempting to access or use the default add-ins within Outlook may be impacted. This information may be updated as our investigation continues.

Next update by: Wednesday, March 25, 2026, at 9:00 PM UTC