External Sharing in SharePoint and OneDrive is changing: What You Need to Know

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In an ongoing effort to create a more secure environment by default, Microsoft is introducing an important security update that will affect how external users access content shared through SharePoint and OneDrive. Starting July 1, 2025, any links shared with external users before your organization enabled Microsoft Entra B2B integration will no longer work. This change applies to all organizations that have already enabled or will enable SharePoint and OneDrive integration with Microsoft Entra B2B (Most organizations I have looked into so far). External users trying to use old links will see an error message saying the organization has updated its guest access settings. To regain access, the content must be reshared. Highlights of how the change affects organizations who have enabled B2B: All external sharing will require guest registration. External users must be added as guests in your Microsoft Entra directory. Access will be managed through Microsoft Entra B2B Invitation Manager. T...

Microsoft Purview DLP Extends to Microsoft 365 Copilot

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As organizations increasingly adopt Microsoft 365 Copilot to enhance productivity and collaboration, ensuring the security of corporate data becomes more and more important. Microsoft Purview Data Loss Prevention (DLP) offers a robust solution to safeguard sensitive information. Purview's new and upcoming DLP capabilities can soon help secure your organization's use of Copilot even better.

Microsoft Purview Data Loss Prevention (DLP) is expanding its capabilities to support Microsoft 365 Copilot. This enhancement will allow DLP policies to identify sensitive documents using sensitivity labels and exclude them from processing in Microsoft 365 Copilot Business Chat.

The feature will be available for customers who already have E5 (or equivalent) licenses together with copilot licenses. Information protection admins can then create policies that will include Microsoft Copilot in addition to all of the existing services.

The preview started in late November, and it should be available to test for most enterprise customers already. Keep an eye on Roadmap ID 423483 for further details.