We've confirmed that all systems are back to normal with no customer impact as of 03/20, 18:28 UTC. Our logs show the incident started on 03/12, 22:00 UTC and that during the 7 days, 20 hours and 28 minutes that it took to resolve the issue customers using Live Metrics Stream might have received partial data regarding their instances.
Root Cause: The failure was due to a bad deployment with the service.
Incident Timeline: 7 days, 20 Hours & 28 minutes - 03/12, 22:00 UTC through 03/20, 18:28 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.