Microsoft 365 Alert – Service Degradation – Microsoft Viva – Users may notice missing Microsoft Copilot impact trend data in the Microsoft Viva Insights portal – RESOLVED

Announcements Arpan Das

18/12/2025 08:12:00 AM

NHSmail Reference: INC46676584

Microsoft Reference: MV1179108

Issue Status: RESOLVED

Issue Description: Users may notice missing Microsoft Copilot impact trend data in the Microsoft Viva Insights portal.

More info: Impact is specific to the total email messages sent using Copilot trend data between Tuesday, July 1, 2025, and Tuesday, October 7, 2025.
This data doesn’t apply to Copilot Assisted Hours or Copilot Assisted Value so those reports are unaffected.

Final Update: 18/12/2025 08:12:00 AM – Microsoft have confirmed through testing with affected users that the impact has been remediated with the backfill operation completed.

Scope of impact: All users accessing Copilot trend data in the Microsoft Viva Insights portal are affected.

Root cause: A change to event-based logic in data provided by Exchange Online contains a code error, preventing the Viva Insights service from accessing the relevant data, resulting in impact.

Next Steps: Microsoft are reviewing their deployment procedures to understand why the code error wasn’t caught during the testing phase. This will allow us to drive service improvements by proactively identifying similar issues in the future and improve their testing processes.