Microsoft 365 Alert : Service Degradation – Microsoft 365 Defender – Some admins may see their automated investigations fail in the Microsoft Defender for Endpoint service – RESOLVED

Announcements Sourav Nandi

21/09/2022 17:02:00 PM (BST)

NHSMail Reference : INC31743568

Microsoft Reference : DZ435763

Issue Status : RESOLVED

Issue Description : Some admins may have seen their automated investigations fail in the Microsoft Defender for Endpoint service.

More info : Admins may have seen their automated investigations fail in the Microsoft Defender for Endpoint service.

Final Update : 26/09/2022 10:17:00 AM – Microsoft’s investigation identified that an unexpected code regression caused automated investigation failures. They have rolled back to a previously known good state and confirmed after a period of monitoring that impact has been remediated.

Root cause : Impact was specific to some admins who are served through the affected infrastructure.

Next steps : Microsoft is reviewing their code to help prevent similar problems in the future.