Microsoft Defender for Office 365: Block Sender in Quarantine notification will require signing in to security portal
Following the feature update described in Message Center post MC711335 – Microsoft Defender for Office 365: Quarantine End User Allow and Block list management, published January 31st, 2024, sign in to the security portal will be required for the Block Sender action in Quarantine notifications.
This message is associated with Microsoft 365 Roadmap ID 380185
When this will happen:
Worldwide: We will begin rolling out early March 2024 and expect to complete by mid-March 2024.
GCC, GCC High, and DoD Release: We will begin rolling out mid-March 2024 and expect to complete by late March 2024.
How this will affect your organization:
When the user clicks on the Block Sender button in the Quarantine notification, the user will now be required to sign in to the security portal at https://security.microsoft.com/quarantine.
Previously, signing in was not required, and the Block Sender action was carried out automatically.
What you need to do to prepare:
There is no action needed to prepare for this change. You may want to notify your users about this change and update any relevant documentation as appropriate.
Message ID: MC718246
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