Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users’ Microsoft Teams Webinar registration confirmation email messages are delayed up to three hours – ONGOING

Announcements Shagufta Naaz

04/06/2026 08:53:00 AM

NHSmail Reference: INC46842490

Microsoft Reference: TM1333683

Issue Status: ONGOING

Issue Description: Users’ Microsoft Teams Webinar registration confirmation email messages are delayed up to three hours.

More info: Impact typically occurs for one to three hours between the time frame of 1:00 PM UTC to 11:00 PM UTC.

Final Update: 04/06/2026 08:53:00 AM –Microsoft has identified an increase in request traffic to the portion of service infrastructure responsible for facilitating Webinar registration confirmation email messages which is causing delays when delivering them to end users. They are evaluating mitigation options to determine the most efficient method to remediate the impact.

Scope of impact: Your organization is impacted by this event, and some users expecting to receive Microsoft Teams Webinar registration confirmation email messages are impacted.

Root cause: An increase in request traffic to the portion of service infrastructure responsible for facilitating Webinar registration confirmation email messages which is causing delays when delivering them to end users.

Next update by: Thursday, June 04, 2026, at 8:00 PM UTC