We've confirmed that all systems are back to normal with no customer impact as of 11/26, 06:25 UTC. Our logs show the incident started on 11/26, 05:05 UTC and that during the 1 hour & 20 minutes that it took to resolve the issue some customers may have experienced Data access in azure portal in East US region
Root Cause: The failure was due to issue with one of the backend service.
Incident Timeline: 1 Hour & 20 minutes - 11/26, 05:05 UTC through 11/26, 06:25 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.
Initial Update: Tuesday, 26 November 2019 06:22 UTC
We are aware of issues within Log Analytics and are actively investigating. Some customers may experience Data access issue in East US region.
Work Around: None
Next Update: Before 11/26 08:30 UTC
We are working hard to resolve this issue and apologize for any inconvenience. -Satya