Microsoft 365 Alert – Service Degradation – Exchange Online – Users may be intermittently unable to create new Microsoft Teams meetings using add-ins in Outlook for Windows – RESOLVED

14/11/2023 08:46:00 AM

NHSMail Reference: INC39517604

Microsoft Reference: EX689431

Issue Status: RESOLVED

Issue Description: Users may be intermittently unable to create new Microsoft Teams meetings using add-ins in Outlook for Windows.

More info: This issue is limited to a subset of users of Outlook for Windows. Where possible, users can bypass impact by creating new Microsoft Teams meetings using the Outlook on the web. Because the issue is intermittent, subsequent attempts to create meetings may succeed.

Final Update: 05/12/2023 17:02:00 PM – Microsoft confirmed that deployment of the fix has completed and they have confirmed via telemetry that impact has been remediated.

Scope of impact: Any user creating a new Microsoft Teams meeting using an add-in in Outlook for Windows may be intermittently impacted.

Root cause: A Microsoft Teams service update introduced a DLL error that occasionally prevents add-ins from acquiring the necessary data from the Microsoft Teams service to create new meetings, resulting in impact.

Next steps: Microsoft are reviewing their update procedures to better identify similar issues during the development and testing cycles.