Microsoft is currently investigating a significant Multi-Factor Authentication (MFA) outage affecting Microsoft 365 Office applications. Users attempting to access services through MFA authentication are experiencing disruptions, with some unable to complete MFA registration and reset procedures.

The tech giant has acknowledged the issue, confirming that the outage specifically impacts users relying on MFA for Microsoft 365 Office apps authentication. As an immediate response, Microsoft is redirecting traffic to alternative infrastructure while investigating the root cause.

Concurrent Issues:
– Unexpected crashes of Microsoft 365 applications on Windows Server 2016 devices
– Recent “Product Deactivated” errors for Microsoft 365 Office apps users
– Previous month’s outage affecting Office web apps and admin center
– November’s worldwide disruption impacting multiple services including Teams, Exchange Online, SharePoint, OneDrive, Purview, Copilot, and Outlook

Resolution Update:
Microsoft has announced service restoration, identifying the cause as an unresponsive MFA infrastructure section in Western Europe. After extended monitoring confirmed stable service health, the incident has been declared resolved.

This incident follows a series of recent Microsoft 365 service disruptions, highlighting the ongoing challenges in maintaining consistent enterprise cloud service availability.