Cornerstone experienced a major incident on August 20, 2026 affecting Response Time and Response Time and 1 more component, lasting 45m. The incident has been resolved; the full update timeline is below.
Affected components
Response TimeResponse TimeResponse TimeResponse Time
Update timeline
- identified Aug 20, 2026, 12:06 PM UTC
Error when creating vILT session (Microsoft Teams VILT Integration): "Error while creating Schedule: Exception of type 'System.ArgumentException' was thrown." Cause has been found and we are working on the fix.
- resolved Aug 20, 2026, 12:51 PM UTC
This incident has been resolved.
- postmortem Aug 20, 2026, 01:51 PM UTC
This issue has resurfaced. The engineering team is working towards solution.