Microsoft 365 Alert – Service Degradation – SharePoint Online – Some users that are mentioned in list comments in SharePoint Online may not receive email notifications- ONGOING

Announcements Shagufta Naaz

21/01/2026 15:15:00 AM

NHSmail Reference: INC46729860

Microsoft Reference: SP1220310

Issue Status: ONGOING

Issue Description: Users that are mentioned in list comments in SharePoint Online may not receive email notifications.

Current Update: 21/01/2026 15:36:00 PM – Microsoft are reviewing any recent changes to the service that may be causing impact to occur.

Scope of impact: Impact is specific some users that are mentioned in list comments in SharePoint Online.

Next update by: Wednesday, January 21, 2026, at 5:30 PM UTC