Microsoft 365 Alert – Service Degradation – Microsoft 365 suite – Some users on the Microsoft Teams classic client can’t create Teams meetings through the Outlook desktop client – RESOLVED

09/05/2024 08:55:00 AM

NHSmail Reference: INC42926476

Microsoft Reference: MO791289

Issue Status: RESOLVED

Issue Description: Some users on the Microsoft Teams classic client can”t create Teams meetings through the Outlook desktop client.

More Info: This event specifically impacts users who had the new Microsoft Teams client installed on their device and uninstalled it in favor of the classic client. This will also impact users that have the latest version of new Microsoft Teams installed, but then switched back to classic teams without uninstalling. Additionally, this issue impacts meetings created using the Teams Meeting add-in.

As our investigation continues, affected users can switch to new Microsoft Teams client then restart their Outlook desktop client, create meetings through the Microsoft Teams calendar, or schedule meetings through the Outlook web app to avoid the impact.

Final Update: 27/05/2024 08:12:00 AM – Microsoft have successfully deployed the fix that reverted the code that wasn’t supporting the add-in on classic Teams and causing the impact. They’ve monitored service health telemetry and have validated that impact has been alleviated.

Scope of impact: This issue may potentially affect some users on the Microsoft Teams classic client that previously used the new client experience who are trying to create Microsoft Teams meetings through the Outlook desktop client.

Root cause: Recent changes to the new Microsoft Teams Outlook add-in caused users who installed the new Microsoft Teams client to have a version of the Teams Meeting add-in that was not supported on the Microsoft Teams classic client installed, which resulted in impact.