We've confirmed that all systems are back to normal with no customer impact as of 09/05, 15:10 UTC. Our logs show the incident started on 09/05, 13:15 UTC and that during the 1 hour 55 minutes that it took to resolve the issue some customers might have experienced errors when accessing or updating alerts. The alerts notifications are not impacted.
Root Cause: The failure was due backend dependency.
Incident Timeline: 1 Hours & 55 minutes - 09/05, 13:15 UTC through 09/05, 15:10 UTC
We understand that customers rely on Azure monitor as a critical service and apologize for any impact this incident caused.