[Dec 15, 9:30 pm PT]
ThousandEyes detected a widespread Azure Active Directory (AD) outage lasting ~1.5 hours from ~00:50 UTC – 2:25 UTC, which may have impacted users around the globe from signing in to Microsoft services like O365. During the outage, authentication requests were returning HTTP 503 service unavailable errors. Azure reports that it mitigated the issue at around 2:25 UTC by rolling over to redundant infrastructure, which cleared the issue and restored service availability.
Live link to view the Azure outage in ThousandEyes here. No login required.