Azure incident

Investigating a spike in 401 authentication errors

Major Resolved View vendor source →

Azure experienced a major incident on June 15, 2026, lasting 43m. The incident has been resolved; the full update timeline is below.

Started
Jun 15, 2026, 11:04 PM UTC
Resolved
Jun 15, 2026, 11:48 PM UTC
Duration
43m
Detected by Pingoru
Jun 15, 2026, 11:04 PM UTC

Update timeline

  1. 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.