M365 Changelog: (Updated) Microsoft Defender for Office 365: Hourly option for notifications

MC383901 — Updated May 9, 2023: Microsoft has updated the message to ensure visibility. Thank you for your patience.

Microsoft is adding a new hourly option to end user quarantine notifications, which will allow users to rely on receiving prompt notifications about quarantined items when appropriate. With this feature, users will be updated frequently once new items land in their quarantine folder.

This message is associated with Microsoft 365 Roadmap ID 93304.

When this will happen:

Standard: will begin rolling out in late November 2022 (previously early October 2022) and be completed by late June 2023 (previously late February 2023).

Government: will begin rolling out in early June 2023 (previously early July 2023) and be completed by late June 2023 (previously late July 2023).

How this will affect your organization:

Using the quarantine policy, Admins will be able to configure an hourly notification frequency for users in their organization. 

Quarantine policy
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What you need to do to prepare:

You might want to notify your users about this change and update your training and documentation as appropriate.