Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users are unable to join some Microsoft Teams meetings through the “Join” button in the meeting chat – ONGOING

Announcements Arpan Das

12/02/2026 08:43:00 AM

NHSmail Reference: INC46748302

Microsoft Reference: TM1231009

Issue Status: ONGOING

Issue Description: Users are unable to join some Microsoft Teams meetings through the “Join” button in the meeting chat

More info: While Microsoft are focused on remediation, users may be able to join meetings through meeting URLs.

Current Update: 12/02/2026 09:21:00 AM – Microsoft collected reproduction logs of the issue and are analyzing them to understand the source of the issue and determine our next troubleshooting steps.

Scope of impact: This issue may potentially impact any user attempting to join affected meetings through the “Join” button in the meeting chat. This information may be updated as our investigation continues.

Next update by: Thursday, February 12, 2026, at 1:00 PM UTC