We've confirmed that all systems are back to normal as of 11/19, 20:24 UTC. Our logs show that the incident started on 11/19, 15:35 UTC and that during the 4 hours and 49 minutes that it took to resolve the issue some of the customers using Azure Log Analytics and/or Sentinel might have experienced data gaps, partial query results and incorrect alerts activation in Germany West Central region.
Root Cause: The failure was due to a recent configuration change in one of our backend services.
Incident Timeline: 4 Hours & 49 minutes - 11/19, 15:35 UTC through 11/19, 20:24 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.