Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users may not be receiving email invite messages for Webinar meetings in Microsoft Teams – ONGOING

Announcements Arpan Das

09/04/2026 09:07:00 AM

NHSmail Reference: INC46793286

Microsoft Reference: TM1273987

Issue Status: ONGOING

Issue Description: Users may not be receiving email invite messages for Webinar meetings in Microsoft Teams.

More info: Some users may be able to register but aren’t receiving email invites. Webinar reports show the registration status as “Progressing”.

Current Update: 09/04/2026 09:07:00 AM–Microsoft are awaiting feedback from some affected users to confirm the issue is remediated.

Scope of impact: Any user expecting email invite messages for Webinar meetings may be impacted.

Root cause: Excess traffic in the affected infrastructure is causing the performance issues and resulting in the queue of email invite messages.

Next update by: Thursday, April 9, 2026, at 9:00 AM UTC