Microsoft Resolves MFA Setup Outage Affecting Users

• •Microsoft experienced a significant outage affecting MFA setup and My Sign-Ins access.
• •Users encountered 504 Gateway Timeout errors during the incident.
• •The issue was resolved within hours, attributed to a cache configuration change.

On June 1, 2026, Microsoft confirmed an outage impacting users' ability to set up multi-factor authentication (MFA) and access the My Sign-Ins platform. The issue was acknowledged around 5 AM ET, with affected users experiencing 504 Gateway Timeout errors. Microsoft implemented mitigation measures, including switching to alternative infrastructure, to address the problem. The outage was attributed to a recent cache configuration change that led to high CPU and memory utilization during peak EU traffic. By 8:41 AM ET, Microsoft reported that access to the My Sign-Ins service was restored, and the incident was classified as resolved. This incident follows earlier service disruptions affecting Microsoft Teams and Outlook.com earlier in the year.