Microsoft 365 Alert – Service Degradation – Exchange Online – Users may have seen some parts of the Outlook UI in English instead of their non-English selected language – RESOLVED

Announcements Arpan Das

17/10/2025 09:08:00 AM

NHSmail Reference: INC46683090

Microsoft Reference: EX1186252

Issue Status: RESOLVED

Issue Description: Users may have seen some parts of the Outlook UI in English instead of their non-English selected language.

More info: This specifically impacts Microsoft 365 services that have the SecurityEnabled property changed to False by the Group Configuration Processor.

Final Update: 17/11/2025 09:12:00 AM – Microsoft have reverted the offending update and confirmed through monitoring service health telemetry that the impact has been remediated.

Scope of impact: Any admin or users attempting to access any Microsoft 365 services with the Microsoft 365 Group SecurityEnabled set to false may be impacted.

Next Steps: Friday, November 21, 2025, at 3:30 PM UTC