| MO1243496 | Microsoft 365 suite | Some admins may be unable to deploy custom add-ins from the Microsoft 365 admin center and users can’t access add-ins |
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| Status | serviceRestored |
|---|---|
| Classification | advisory |
| User Impact | Admins may have been unable to deploy custom add-ins from the Microsoft 365 admin center. |
| Last Updated | 03/20/2026 18:21:49 |
| Start Time | 01/21/2026 10:27:00 |
| End Time | 03/19/2026 19:00:00 |
| Latest Message | Title: Some admins may be unable to deploy custom add-ins from the Microsoft 365 admin center and users can’t access add-ins
User impact: Admins may have been unable to deploy custom add-ins from the Microsoft 365 admin center. More info: Admins may have seen an error that stated, “Learn more about eligibility requirements” Final status: Our deployment has completed and we’ve confirmed through service health telemetry and with a subset of affected users that the impact is remediated. Scope of impact: Any admin that attempted deploy custom add-ins from the Microsoft 365 admin center may have been impacted. Start time: Wednesday, January 21, 2026, at 10:27 AM UTC End time: Thursday, March 19, 2026, at 7:00 PM UTC Root cause: A recent service change designed to enforce stricter authentication requirements blocked admins from deploying custom add-ins from the Microsoft 365 admin center. Next steps: This is the final update for the event. |