User impact: Admins may have been unable to install some Microsoft Teams apps for users using Microsoft Graph API.

More info: Apps that were affected do not have a webApplictionInfo section defined in their manifest.

Admins may have received a 400 error when attempting to install these apps.

Final status: We’ve fully deployed our fix for the issue and verified through an extended period of monitoring internal telemetry that impact is fully resolved.

Scope of impact: Any admin may have been unable to install some Microsoft Teams apps in the personal scope of users using Microsoft Graph API.

Start time: Tuesday, April 25, 2023, at 7:00 PM UTC

End time: Thursday, May 4, 2023, at 9:15 PM UTC

Root cause: A recent feature update introduced a regression that has led to impact.

Next steps:
– We’re reviewing our update testing and validation methods to better identify code issues such as this prior to deployment to prevent similar impact in the future.

This is the final update for the event.