
To enable "Anyone" sharing permissions for a specific SharePoint Online site while restricting other sites to "Existing guests," follow these steps: 1. Configure Sharing Settings for the SharePoint Online Site Collection. 2. Restrict Sharing for All Other Sites. 3. Use PowerShell for Bulk Configuration. 4. Verify and Monitor Sharing Activities. 5. Ensure necessary permissions, compliance, and user communication are in place. This will help manage sharing permissions for individual sites while maintaining stricter controls on others.