MC744113 Stay informedUpdated messageFeature updateAdmin impact

Microsoft Defender for Office 365: New Quarantine release details

From Microsoft 365 Message Center Archive by Merill Fernando · Microsoft may not have sent this notice to your tenant.

Rollout dates are often only in the text. When Microsoft moves them, the change shows under "What changed".

Schedule dates changed in the text

Date phrases in schedule sentences differ between the versions we saw

Seen 6 Jun 2024 ~~late May 2024, mid-June 2024~~ → late June 2024, early July 2024
Seen 8 May 2024 ~~late April 2024~~ → late May 2024, mid-June 2024

Read from date phrases in Microsoft's text, not from notice metadata. A changed phrase can be a moved rollout, a new milestone or just rewording; "What changed" below shows which.

What the notice says

Microsoft’s text, safely structured

Updated June 6, 2024: We have updated the rollout timeline below. Thank you for your patience.

In Microsoft Defender for Office 365, we are rolling out new details on who or what is responsible for releasing a message from quarantine.

These details will now be included in the email summary flyout panel accessible from the Quarantine page.

When this will happen

General Availability (Worldwide, GCC, GCC High): We will begin rolling out late March 2024 and expect to complete by late June 2024 (previously late May).

DoD: We will begin rolling out mid-April 2024 and expect to complete by early July 2024 (previously mid-June).

How this will affect your organization

After a message is released from quarantine, the Release by field will be propagated with the email address of the user or admin responsible for the release.

The Release by field will also capture releases carried out by the system:

Please note that previously this information was available only in audit logs.

What you need to do to prepare

The purpose of this communication is for awareness. Admins should also update their training documentation as they see fit.

Learn more: Manage quarantined messages and files as an admin | Microsoft Learn

What changed

Between archive captures, newest first

6 Jun 2024
Updated ~~May 8,~~June 6, 2024: We have updated the rollout timeline below. Thank you for your … begin rolling out late March 2024 and expect to complete by late ~~May~~June 2024 (previously ~~mid-April).~~late May). DoD: We will begin rolling out mid-April 2024 and expect to complete by ~~mid-June~~early July 2024 (previously ~~late April).~~mid-June). How this will affect your organization: After a message is released from …
8 May 2024
- Tags ~~Feature update, Admin impact~~ → Updated message, Feature update, Admin impact
Updated May 8, 2024: We have updated the rollout timeline below. Thank you for your patience. In Microsoft Defender for Office 365, we are rolling out new details … will begin rolling out late March 2024 and expect to complete by ~~mid-April 2024.~~late May 2024 (previously mid-April). DoD: We will begin rolling out mid-April 2024 and expect to complete by mid-June 2024 (previously late ~~April 2024.~~April). How this will affect your organization: After a message is released from …
18 Mar 2024 · first version seen

Learn more

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What this page cannot tell you

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