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

Announcements Arpan Das

09/04/2026 09:07:00 AM

NHSmail Reference: INC46793286

Microsoft Reference: TM1273987

Issue Status: RESOLVED

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”.

Final Update: 11/08/2026 02:25:00 PM–Microsoft has received confirmation from some affected users to advise that impact is remediated.

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

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

Next steps: Microsoft is analysing traffic performance data and trends on the affected infrastructure connection to help prevent this problem from happening again.