Microsoft 365 Alert – Service Degradation – Microsoft Teams – Some users may be unable to schedule Microsoft Teams meetings in Microsoft Teams or Outlook– RESOLVED

01/09/2025 08:42:00 AM

NHSmail Reference: INC46616168

Microsoft Reference: TM1142501

Issue Status: RESOLVED

Issue Description: Users may be unable to schedule Microsoft Teams meetings in Microsoft Teams or Outlook.

More info: Users may be unable to schedule Microsoft Teams meetings in the following clients:

– Microsoft Teams desktop client
– Microsoft Teams web client
– Outlook desktop client
– Outlook on the web
– Outlook mobile app
-Outlook for Mac

Users may notice that the Microsoft Teams meeting add-in is missing when using one of the affected Outlook clients, which is preventing users from being able to create Microsoft Teams meetings.

Users may also notice that the Microsoft Teams meeting information is missing on Calendar invites.

Users with access to the Microsoft Teams mobile app may be able to bypass impact and schedule Microsoft Teams meetings using this client while we work to investigate and resolve this issue.

Final Update: 02/09/2025 08:36:00 AM – Microsoft have completed running the background settings for all affected users and confirmed after testing with a subset of users that the impact is remediated.

Scope of impact: Some users attempting to schedule Microsoft Teams meetings in Microsoft Teams or Outlook may be impacted.

Root cause: A recent update to Microsoft Teams, which was intended to adjust how Microsoft Teams licenses are checked, introduced a code error which has resulted in users being unable to schedule Microsoft Teams meetings as their license can’t be verified.

Next Steps: Microsoft are reviewing their service update testing and validation procedures to identify and prevent similar code errors in deployments moving forward.