The correct answer is Microsoft 365 Copilot . Microsoft Learn states that Restricted SharePoint Search (RSS) gives organizations time to review and correct permissions on SharePoint sites, and then add only those reviewed sites to an allowed list that Copilot can access . That means RSS is specifically about restricting Copilot’s access to SharePoint content, not blocking administrators, guest users, or Microsoft Purview eDiscovery from those sites.

This distinction is important. Microsoft explains that users can still access SharePoint content based on their normal permissions, while RSS limits what Microsoft 365 Copilot can use as grounding data until site permissions are reviewed and approved. So the feature helps reduce oversharing risk in Copilot without removing a user’s direct ability to find or open content they already have permission to access in SharePoint. In other words, the restriction is placed on Copilot’s searchable grounding scope , not on the user’s own SharePoint permissions. That is why the sentence is correctly completed with Microsoft 365 Copilot .