AMA - Prepare your data for Copilot: Essential tools and techniques

Thank you for your question! In addition to Alex's resources below, the panelists covered this topic around 17:30. 

Yes, this can be done with SharePoint Advanced Management (which is included with M365 Copilot) and with DSPM for AI in Purview. There is also a blueprint on how to address oversharing: https://aka.ms/Copilot/OversharingBlueprintLearn