Microsoft 365 Alert – Service Degradation – Exchange Online – Some users may be unable to join teams in Microsoft Teams when using a join code – RESOLVED

Announcements Arpan Das

17/11/2025 09:37:00 AM

NHSmail Reference: INC46683444

Microsoft Reference: TM1186997

Issue Status: RESOLVED

Issue Description: Users may be unable to join teams in Microsoft Teams when using a join code

More info: Users may get a specific error that translates to “Couldn’t join this team with that code. Double-check the code or try another one”.

As workaround, users can send a link to join the team to bypass using the join code.

Final Update: 20/11/2025 09:03:00 AM – Microsoft’s fix deployment is complete and they have determined from service telemetry that this issue is resolved.

Scope of impact: This problem may intermittently impact any user attempting to join teams in Microsoft Teams when using a join code.

Next Steps: Microsoft are reviewing their validation and updating procedures to better detect and prevent issues like this prior to deployment in the future.