We've confirmed that all systems are back to normal with no customer impact as of 7/7, 06:05 UTC. Our logs show the incident started on 7/7, 05:20 UTC and that during the 45 minutes that it took to resolve the issue. Some of the customers may have experienced issues with Azure monitor metrics and alerts.
Root Cause: The failure was due to the dependent backend service unhealthy.
Incident Timeline: 45 minutes - 7/7, 05:20 UTC through 7/7, 06:05 UTC
We understand that customers rely on Metric Alerts as a critical service and apologize for any impact this incident caused.