Bottom Line: Microsoft authentication services have experienced a global outage, preventing MFA configuration and access to the central portal for sign-in activity management.
On 1 June 2026, Microsoft confirmed a global outage of its authentication platform, which blocks the setup of multi-factor authentication (MFA) and disrupts access to the “My Sign-Ins” portal. The disruption was classified as high-priority and affects enterprise customers and end users globally.
On 1 June 2026, Microsoft officially confirmed a disruption in its cloud infrastructure affecting core authentication functions. The outage blocks the new setup of multi-factor authentication (MFA) and access to the administrative portal mysignins.microsoft.com. The disruption was registered at approximately 5:00 AM US Eastern Time. The incident is tracked in the Admin Dashboard under ticket ID MO1329260.
Technical error analysis reveals systematic 504 gateway timeout errors during access attempts. This error message indicates a missing or delayed response from backend authentication databases to upstream load balancers. The problem affects both manual configurations via web browsers and automated verification processes initiated by cloud applications. For CISOs, this means: the ability to enforce user security policies and configure MFA as a core security barrier is unavailable.
Microsoft has initiated a failover process and redirected faulty traffic to alternative server capacity. According to the company, these initial remedial measures have been completed. However, elevated error rates persisted in certain network segments. Engineers are currently optimizing the processing of incoming service requests in server queues to prevent gateway overloads. Microsoft has not yet specified which geographic regions are most severely affected.
The current outage is not isolated: in the ongoing year 2026, Microsoft has already reported similar issues multiple times — including Microsoft Teams disruptions that blocked chat and voice calls, and an Outlook.com outage with sign-in problems spanning several hours. This series underscores the vulnerability of large cloud authentication platforms and reinforces the need for enterprises to implement redundant authentication mechanisms and contingency plans.
Source: www.it-daily.net · Published 1 June 2026
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