Microsoft 365 Alert – Service Degradation – Exchange Online – Some on-premises users can’t send or receive Exchange Online email messages on iOS and Android mobile devices – RESOLVED

Announcements Sourav Nandi

21/08/2025 08:40:00 AM

NHSmail Reference: INC46609600

Microsoft Reference: EX1138497

Issue Status: RESOLVED

Issue Description: Some on-premises users may be unable to send or receive Exchange Online email messages on iOS and Android mobile devices.

More info: On-premises users may be unable to send or receive Exchange Online email messages on iOS and Android mobile devices.

Final Update: 26/08/2025 08:31:00 AM – Microsoft have determined that this issue is a duplicate of another event. Please look for further updates in EX1137017. This communication will expire in 24 hours.