Microsoft 365 Alert – Service Degradation – Exchange Online – Some users may experience delays when accessing their Exchange Online mailboxes via one or more connection methods – RESOLVED

Announcements Shagufta Naaz

19/05/2026 09:00:00 AM

NHSmail Reference: INC46829922

Microsoft Reference: EX1314710

Issue Status: RESOLVED

Issue Description: Some users may experience delays when accessing their Exchange Online mailboxes via one or more connection methods.

More info: Impacted connection methods include but may not be limited to:

– Classic Outlook desktop client.

Final Update: 20/05/2026 08:55:00 AM–After further analysis, Microsoft have determined that the no broad service incident actually occurred. The service is healthy and they will continue to monitor the environment to identify any discrepancies in service availability. This communication will expire in 24 hours.