Microsoft 365 Alert – Service Degradation – Microsoft Defender XDR – Some users may see an unknown status for submissions in Microsoft Defender for Office 365 – ONGOING

10/04/2025 09:15:00 AM

NHSmail Reference: INC46502070

Microsoft Reference: DZ1052047

Issue Status: ONGOING

Issue Description: Some users may see an unknown status for submissions in Microsoft Defender for Office 365.

Current Update: 17/04/2025 09:23:00 AM – Following the deployment of our fix, Microsoft have determined that the problem is no longer occurring for new submissions by admins; however, the subset of submissions that are showing an unexpected status will require processing before impact has been remediated. They are monitoring this process, which they are expecting will have completed and remediated the impact by their next scheduled update.

Scope of impact: Impact may occur for some users that attempt to make submissions in Microsoft Defender for Office 365.

Root cause: A recent service change to update a portion of infrastructure that supports submissions in Microsoft Defender for Office 365 resulted in impact.

Next update by: Thursday, April 17, 2025, at 6:00 PM UTC