Need help with DLP Policy in Purview

Hello skubba1,

You’ll have significantly more control with E5. The articles below provide detailed guidance and align well with your requirements:

Learn about using Microsoft Purview Data Loss Prevention to protect interactions with Microsoft 365 Copilot and Copilot Chat | Microsoft Learn

Copilot Control System Security and Governance | Microsoft Learn

With E3, you can receive notifications when oversharing occurs and inherit sensitivity labels, but you cannot enforce DLP policies for Copilot. You can still disable connected experiences—meaning Copilot in Word, Excel, etc., can be turned off (though not for Microsoft 365 Chat).

Refer to: https://learn.microsoft.com/en-us/microsoft-365-apps/privacy/manage-privacy-controls#policy-setting-for-connected-experiences-that-analyze-your-content 

https://learn.microsoft.com/en-us/copilot/microsoft-365/microsoft-365-copilot-privacy#privacy-control-for-connected-experiences-that-analyze-your-content 

Hope this helps!

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