Quarantine experience update in Microsoft Defender and Exchange Online: Restore temporarily deleted items [MC1134736]

Message ID: MC1134736

Introduction

We’re enhancing the quarantine experience in Microsoft Defender and Exchange Online to improve visibility and control over items that have been temporarily deleted. With this update, users will be able to view and restore messages that were previously removed from the quarantine view but still exist in the system.

When this will happen

• General Availability (Worldwide): Rollout will begin mid-August 2025 and is expected to complete by mid-September 2025.
• General Availability (GCC, GCC High, DoD): Rollout will begin early September 2025 and is expected to complete by late September 2025.

How this affects your organization

Users in both Microsoft Defender and Exchange Online quarantine portals will gain the ability to:

• View messages that were temporarily deleted from quarantine using the new Temporarily deleted filter under Release Status.
• Restore these messages back to the quarantine view using the new Restore temporarily deleted option.

Messages that have been permanently deleted will remain inaccessible. This feature is on by default and applies only to temporarily deleted items.

What you can do to prepare

• Inform users about the new filter and restore option to reduce confusion and potential help desk calls.
• Update internal documentation or training materials to reflect the new functionality.
• Monitor user feedback and usage to determine if additional guidance or support is needed.

No configuration changes are required to enable this feature.

Compliance considerations

No compliance considerations identified, review as appropriate for your organization.

Source: Microsoft

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