Update: Microsoft has resolved this issue.
Microsoft rerouted traffic to their resilient DNS capabilities and are seeing improvement in service availability. They are continuing to investigate the cause of the DNS issue.
Summary of Impact
Between approximately 21:30 UTC and 22:30 UTC on 01 Apr 2021, customers may have experienced intermittent issues accessing Microsoft services, including Azure.
This can impact access to your Akumina sites, especially if you have enabled Azure AD.
You can find up-to-date status directly from Microsoft here: https://status.azure.com/en-us/status
More details on Microsoft's findings and next steps can be found here: https://status.azure.com/en-us/status/history/
1:58 pm EST on April 2, 2021