We've confirmed that all systems are back to normal with no customer impact as of 11/9, 18:40 UTC. Our logs show the incident started on 11/9, 13:50 UTC and that during the 4 hours and 50 minute that it took to resolve the issue customers would have experienced data access issues while trying to query their workbooks whose data access calls were routed through the West US or West Europe endpoints.
Root Cause: The failure was due to a backend dependency.
Incident Timeline: 4 Hours & 5 minutes - 11/9, 13:50 UTC through 11/9, 18:40 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.