--
Microsoft 365 Service health status
Title: Unable to access Microsoft 365 services
User impact: Affected users are unable to authenticate to and access Microsoft 365 services.
Current status: We've received reports of an issue affecting access to Microsoft 365 services. We've identified a degraded portion of infrastructure that manages authentication requests and have restarted that infrastructure to mitigate impact.
Scope of impact: This issue may potentially affect any of your users attempting to access Microsoft 365 services.
Start time: Tuesday, January 29, 2019, at 9:15 PM UTC
Preliminary root cause: A portion of infrastructure that manages authentication requests is degraded, affecting access to one or more Microsoft 365 services.