Microsoft 365 Alert – Service Degradation – Microsoft Defender XDR – Users may experience delays in security insight updates within Microsoft Defender for Identity – RESOLVED

10/07/2026 08:35:00 AM

NHS.net Connect Reference: INC46874890

Microsoft Reference: DZ1421448

Issue Status: RESOLVED

Issue Description: Users may experience delays in security insight updates within Microsoft Defender for Identity.

More info: Criticality enrichment information may become stale, which can affect the timeliness of risk score calculations and custom detections.

Final Update: 13/07/2026 09:35:00 AM– Microsoft has identified an underlying issue within the backend infrastructure responsible for delivering security insight updates in Microsoft Defender for Identity, which caused service performance degradation and resulting in impact. They have implemented optimizations to improve service performance and, after a period of monitoring, confirmed that security insight updates are processing as expected and the issue has been resolved.

Scope of impact: Impact is specific to some users attempting to view or rely on criticality-based insights and enrichments in Microsoft Defender for Identity.

Root cause: An underlying issue within the backend infrastructure responsible for delivering security insight updates in Microsoft Defender for Identity, which caused service performance degradation and resulting in impact.

Next steps: Microsoft is analyzing performance data and trends on the affected infrastructure to help prevent this problem from happening again.