RM557191 - Microsoft Purview: Data Loss Prevention – Block External Domain/User action in DLP for SharePoint/OneDrive

Block External Domain/User action in Microsoft Purview DLP for SharePoint and OneDrive, gives organizations stronger control over who can access sensitive files. With this enhancement, admins can configure DLP policies that block file access for specific external domains or individual users. This capability helps prevent unintended exposure by external users and supports enterprise compliance requirements.

GA date: May CY2026

Preview date: April CY2026