We've confirmed that all systems are back to normal with no customer impact as of 04/13, 11:10 UTC. Our logs show the incident started on 04/13, 10:00 UTC and that during the 1hour & 10 minutes that it took resolve the issue some customers may have experienced data access issue, missed or delayed log search alerts in West Europe region
Root Cause: The failure was due to one of our backened service
Incident Timeline: 1 Hours & 10 minutes - 04/13, 10:00 UTC through 04/13, 11:10 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.