Microsoft 365 Alert – Service Degradation – Microsoft 365 suite – Users may be unable to setup MFA or access the mysignins.microsoft.com website – RESOLVED

Announcements Arpan Das

01/06/2026 12:10:00

NHSmail Reference: INC46839382

Microsoft Reference: MO1329260

Issue Status: RESOLVED

Issue Description: Users may be unable to setup MFA or access the mysignins.microsoft.com website.

More info: Users may encounter 504 Gateway Timeout errors when trying to access mysignins.microsoft.com

Final Update: 02/06/2026 8:46:00 AM – Microsoft has identified a recent cache configuration change required a failover. During the failover, the service experienced high CPU and memory utilization as EU traffic peaked, which prevented the MySignIn service from processing the volume of requests. Mitigation actions have since been rolled back, and traffic has been restored to the original infrastructure.

Scope of impact: Some users attempting to setup MFA or accessing the mysignins.microsoft.com website may be impacted.

Next steps:Microsoft are continuing to monitor the service and will complete a thorough post-incident review to help prevent similar issues in the future.

They will provide a preliminary Post-Incident Report within two business days and a final Post-Incident Report within five business days.