Final Update: Monday, 07 December 2020 08:34 UTC
We've confirmed that all systems are back to normal with no customer impact as of 12/07, 07:40 UTC. Our logs show the incident started on 12/07, 03:46 UTC and that during the ~4 hours that it took to resolve the issue, some customers may have experienced difficulties accessing and querying resource data. Additionally, customers may have experienced false-positive and/or missed alerts in North Europe region.
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Root Cause: The failure was due to an upgrade into one of our back end systems.
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Incident Timeline: 4 Hours - 12/07, 03:46 UTC through 12/07, 07:40 UTC
We understand that customers rely on Application Insights, Log Analytics and Log Search Alerts as a critical service and apologize for any impact this incident caused.
-Sandeep