Microsoft 365 Alert – Service Degradation – Microsoft Defender XDR – Users are unable to release or preview ZAP email messages from quarantine in Microsoft Defender for Office 365 – RESOLVED

Announcements Arpan Das

07/04/2026 09:06:00 AM

NHSmail Reference: INC46791355

Microsoft Reference: DZ1272634

Issue Status: RESOLVED

Issue Description: Users are unable to release or preview ZAP email messages from quarantine in Microsoft Defender for Office 365.

More info: Impact occurs in the Microsoft Defender for Office 365 security center.

Users receive an error message incorrectly stating that “The message has been deleted”. Users can attempt to retry to release the email messages and it may succeed.

Final Update: 10/04/2026 10:19:00 AM – Microsoft fix deployment is complete, and they have determined from service telemetry that this issue is resolved.

Scope of impact: Your organization is impacted by this issue, and users are unable to release or preview quarantined ZAP email messages from the Microsoft Defender for Office 365 security center. This section may be updated as our investigation continues.

Root cause: A recent update to the service infrastructure that supports quarantined email messages contained a code issue, leading to impact.

Next steps by: Microsoft are reviewing their validation and updating procedures to better detect and prevent issues like this prior to deployment in the future.