Final Update: Thursday, 25 February 2021 14:23 UTC
We've confirmed that all systems are back to normal with no customer impact as of 02/25, 01:22 UTC. Our logs show the incident started on 02/25, 01:55 UTC and that during the 30 minutes that it took to resolve the issue some customers may have experienced intermittent data gaps and incorrect alert activation in East US region.
Root Cause: The failure was due to issue in one of our dependent service.
Incident Timeline: 30 minutes - 02/25, 01:22 UTC through 02/25, 01:55 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.