We've confirmed that all systems are back to normal with no customer impact as of 12/17, 11:55 UTC. Our logs show the incident started on M/D, 11:25 UTC and that during the 30 minutes that it took to resolve the issue 8% of customers experienced data access issue in azure portal.
Root Cause: The failure was due to one of our dependent services.
Incident Timeline: 30 minutes - 12/17, 11:25 UTC through 12/17, 11:55 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.
Initial Update: Monday, 17 December 2018 12:07 UTC
We are aware of issues within Application Insights and are actively investigating. Some customers may experience Data Access.
Work Around: None
Next Update: Before 12/17 14:30 UTC
We are working hard to resolve this issue and apologize for any inconvenience.