Microsoft Azure incident
Investigating a spike in 401 authentication errors
Resolved after 45 minutes, on June 15, 2026.
We are actively investigating customer alerts of 401 authentication errors when pulling images from mcr.microsoft.com. We’ve identified a potential underlying factor related to a recent update made to a backed service and we are actively working on determining mitigation workstreams. More information will be provided shortly.
Update timeline
- monitoring Jun 15, 2026, 11:04 PM UTC
We are actively investigating customer alerts of 401 authentication errors when pulling images from mcr.microsoft.com. We’ve identified a potential underlying factor related to a recent update made to a backed service and we are actively working on determining mitigation workstreams. More information will be provided shortly.
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