Microsoft 365 Alert – Service Degradation – Microsoft 365 suite – Users in North Europe may be unable to login to Microsoft 365 services using Multi-Factor Authentication (MFA) – RESOLVED

Announcements Habiba Tabasum

19/06/2023 04:46:00 PM (GMT)

NHSmail Reference : INC36493206

Microsoft Reference : MO596067

Issue Status : RESOLVED

Issue Description : Users may be unable to login to Microsoft 365 services using MFA.

Final Update : 20/06/2023 08:24:00 AM – Microsoft’s monitoring has confirmed that the optimizations have remediated this issue, and requests are now completing as expected.

Scope of impact : Your organization is affected by this event, and any user located in North Europe may be unable to login to Microsoft 365 services using MFA.

Root cause : An unexpected high increase in user requests was causing a section of infrastructure, responsible for facilitating MFA sign-in requests, to operate below acceptable performance thresholds and resulting in impact.

Next steps : Microsoft are continuing to review historical service telemetry to better identify similar user request trends and prevent similar issues in the future.