Deploying Outlook add-ins might fail via Integrated Apps page of the M365 admin center

Incident Report for Hoxhunt

Resolved

This incident has now been declared as resolved.
Microsoft's global rollout for the fix took some time but Hoxhunt has verified in its own test environments that add-in deployment again working as expected.

Hoxhunt Support Team

Posted Nov 26, 2025 - 13:20 EET

Monitoring

Microsoft's Engineering team has rolled out a fix to production a moment ago, and they are expecting it to arrive to affected tenants soon.

Hoxhunt Support Team

Posted Nov 25, 2025 - 13:20 EET

Update

Microsoft has been able to reproduce the issue and continues to pinpoint the root cause with their engineers.

Hoxhunt Support Team

Posted Nov 24, 2025 - 11:08 EET

Investigating

Microsoft is having issues with add-in deployment via M365 Admin Center > Integrated Apps, potentially preventing add-ins from being centrally deployed, re-deployed and updated both via manifests as well as via AppSource.

Microsoft is currently investigating the root cause, and their progress can be observed here: https://github.com/OfficeDev/office-js/issues/6321

NOTE: The deployment issue doesn't affect the functionality of currently deployed Hoxhunt add-ins.

Hoxhunt Support Team

Posted Nov 24, 2025 - 09:24 EET

This incident affected: Hoxhunt Report Button (Hoxhunt Outlook add-in).