Microsoft 365 Alert – Service Degradation – Microsoft Teams – Some users may be intermittently unable to browse apps in Microsoft Teams – ONGOING

Announcements Shagufta Naaz

20/04/2026 8:50:00 AM

NHSmail Reference: INC46803096

Microsoft Reference: TM1283997

Issue Status: ONGOING

Issue Description: Users are unable to communicate with external domains in Microsoft Teams.

More info: Affected users are able to manage their existing apps without issue.

Current Update: 20/04/2026 08:56:00 AM– Microsoft are continuing to validate the aforementioned corrected version of the change in our testing environment. Once this process is complete, they will begin deploying it to the affected environments and anticipate that they will be able to provide a remediation timeline by their next scheduled communications update.

Scope of impact: This issue may intermittently impact some users attempting to browse apps in Microsoft Teams. This section may be updated as our investigation continues.

Root cause: A recent change intended to update a portion of the Microsoft Teams app store infrastructure is resulting in impact.

Next update by: Tuesday, April 21, 2026, at 1:30 AM