Final Update: Thursday, 12 December 2019 18:54 UTC
We've confirmed that all systems are back to normal with no customer impact as of 12/12, 16:40 UTC. Our logs show the incident started on 12/12, 16:15 UTC and that during the 25 minutes that it took to resolve the issue customers could have experience data latency in the West US 2 region.
Root Cause: The failure was due to one of our backend services.
Incident Timeline: 25 minutes - 12/12, 16:15 UTC through 12/12, 16:40 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.