Microsoft 365 Alert – Service Degradation – Exchange Online – Users may experience errors or failures when accessing their mailbox via one or more Exchange Online connection methods – RESOLVED

Announcements Arpan Das

18/06/2025 09:10:00 AM

NHSmail Reference: INC46692804

Microsoft Reference: EX1190366

Issue Status: RESOLVED

Issue Description: Users may experience errors or failures when accessing their mailbox via one or more Exchange Online connection methods.

Final Update: 28/11/2025 08:46:00 AM – Microsoft have determined that this issue is a duplicate of another event. Please look for further updates in EX1189996. This communication will expire in 24 hours.