We've confirmed that all systems are back to normal with no customer impact as of 06/10, 06:43 UTC. Our logs show the incident started on 06/10, 03:42 UTC and that during the ~3 hours that it took to resolve the issue some customers would have experienced data access issue while accessing OMS portal.
Root Cause: The failure was due to Azure Storage outage in West Europe.
Incident Timeline: 3 Hours & 01 minutes - 06/10, 03:42 UTC through 06/10, 06:43 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, 10 June 2018 05:14 UTC
We are aware of issues within Log Analytics and are actively investigating. Some customers may experience data access issue in OMS Portal.
Work Around: None
Next Update: Before 06/10 09:30 UTC
We are working hard to resolve this issue and apologize for any inconvenience.