Final Update: Thursday, 15 November 2018 08:20 UTC
We've confirmed that all systems are back to normal with no customer impact as of 11/15, 07:00 UTC. Our logs show the incident started on 11/12,19:00 UTC and that during the 60 hours that it took to resolve the issue customers of affected 2481 subscriptions experienced Data Access issues globally while attempting to run queries.
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Root Cause: The failure was due to one of our dependent services.
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Incident Timeline: 60 Hours & 0 minutes - 11/12,19:00 UTC through 11/15, 07:00 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.
-Madhuri