EX1164058: Exchange Online Service Health Incident (False Positive)

[365 Service Alert]

Some users may experience issues accessing mailboxes via one or more connection methods in Exchange Online.                                                                                                                                                                                                 

Some users may experience issues accessing mailboxes via one or more connection methods in Exchange Online ID: EX1164058 Issue type: Incident Status False Positive Impacted services Exchange Online Details Title: Some users may experience issues accessing mailboxes via one or more connection methods in Exchange Online User impact: Users may experience errors or failures when accessing their mailbox via one or more Exchange Online connection methods. Current status: We've identified a possible configuration change that may be causing impact and are reviewing this change to confirm this theory and to identify a mitigation plan. Scope of impact: This issue impacts internal Microsoft users only attempting to access their mailboxes via one or more connection methods in Exchange Online. Next update by: Thursday, October 2, 2025, at 3:30 PM UTC Is this message helpful? Did you find this email helpful? Yes No To customize what’s included in this email, who gets it, or to unsubscribe, set your Service health preferences. If you are receiving this email because your Admin added you as a recipient, please contact your Admin to unsubscribe. Privacy Statement Microsoft Corporation, One Microsoft Way, ​Redmond, WA 98052​