This incident has been resolved. Microsoft has updated a preliminary RCA for the initial impact to Microsoft services and it is available on their Status history page: https://status.azure.com/en-us/status/history/
Posted Apr 02, 2021 - 02:36 UTC
Monitoring
After Microsoft rerouted traffic to their resilient DNS capabilities, all site alarms monitoring by Optimizely have cleared.
Posted Apr 01, 2021 - 22:52 UTC
Update
Microsoft update: Microsoft rerouted traffic to our resilient DNS capabilities and are seeing improvement in service availability. We are continuing to investigate the cause of the DNS issue.
Update from Microsoft: DNS issue impacting multiple Microsoft services - Investigating
SUMMARY OF IMPACT: Starting at approximately 21:30 UTC on 01 Apr 2021, a subset of customers may experience intermittent issues accessing Microsoft services, including Azure, Dynamics, and Xbox Live. See https://status.azure.com/en-us/status
Posted Apr 01, 2021 - 22:19 UTC
Update
Microsoft has updated their status page: We are currently investigating reports of an issue affecting Azure DNS. More information will be provided as it is known.