Microsoft 365 Alert – Service Degradation – Exchange Online – Potential issues accessing mailboxes via one or more connection methods – NEW

Announcements Sharmista Mohanta

23/06/2026 09:18:00 AM

NHSmail Reference: INC46859073

Microsoft Reference: EX1401733

Issue Status: OPEN

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

Current Update: 23/06/2026 09:19:00 AM – Microsoft is investigating a potential issue and checking for impact to your organization. They will provide an update within 60 minutes.