As of 01:30 UTC on July 19, the M365 status page advises "service availability is gradually returning to a healthy state following our traffic redirection efforts" and that Redmond has "identified a potential root cause that may have contributed to the impact. Our team is currently validating these findings and our mitigation strategy to ensure the issue is resolved as quickly as possible."
As part of the investigation, we have reviewed previous deployments. We've determined the underlying cause and are currently applying mitigation through multiple workstreams.
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