We've confirmed that all systems are back to normal with no customer impact as of 04/18, 02:25 UTC. Our logs show the incident started on 04/18, 02:00 UTC and that during the 25 minutes that it took to resolve the issue some customers may have experienced data access issue and delayed or missed Log Search Alerts in West Europe region.
Root Cause: The failure was due to one of our dependent service.
Incident Timeline: 25 minutes - 04/18, 02:00 UTC through 04/18, 02:25 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.
Initial Update: Sunday, 18 April 2021 14:57 UTC
We are aware of issues within Log Analytics and are actively investigating. Some customers may experience data access issue and delayed or missed Log Search Alerts in West Europe region.
Work Around: None.
Next Update: Before 04/18 18:00 UTC
We are working hard to resolve this issue and apologize for any inconvenience. -Deepika