Microsoft 365 Alert – Service Degradation – Microsoft Purview – Users may be unable to access activity explorer in the Microsoft Purview portal – ONGOING

Announcements Shagufta Naaz

09/04/2026 09:00:00 AM

NHSmail Reference: INC46794121

Microsoft Reference: MP1274841

Issue Status: ONGOING

Issue Description: Users may be unable to access activity explorer in the Microsoft Purview portal.

More info: Affected users may be unable to load Activity Explorer or may see it reported as unavailable due to licensing checks incorrectly returning ineligible results.

In some cases, users may also experience issues retrieving sensitivity labels when using the Azure Information Protection (AIP) unified labeling client.

Current Update: 09/04/2026 09:00:00 AM–Microsoft has determined that a network authentication component misconfiguration is causing impact to occur. They have fixed the misconfiguration and are restarting the affected services to mitigate impact.

Scope of impact: Some users attempting to access Activity Explorer in the Microsoft Purview portal or retrieve sensitivity labels using the Azure Information Protection (AIP) unified labeling client may be impacted. This information may be updated as our investigation continues.

Root cause: A network authentication component misconfiguration is causing impact to occur.

Next update by: Thursday, April 9, 2026, at 8:00 PM UTC