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Final Update: Wednesday, 31 July 2019 17:15 UTC

We've confirmed that all systems are back to normal with no customer impact as of 07/31, 17:15 UTC. Our logs show the incident started on 07/31, 14:45 UTC and that during the 1 hour 30 minutes that it took to resolve the issue some customers in East US region might have experienced intermittent data access issues while accessing log analytics data and performing queries.
Root Cause: The failure was due to issue in one of our dependent services.
Incident Timeline: 1 hour 30 minutes - 07/31, 14:45 UTC through 07/31, 16:15 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.
    

Initial Update: Wednesday, 31 July 2019 16:18 UTC


We are aware of issues within Log Analytics and are actively investigating. Some customers in East US region may experience intermittent Data Access issues using Log Analytics.


Next Update: Before 07/31 19:30 UTC


We are working hard to resolve this issue and apologize for any inconvenience.


-Sindhu