To allow unauthenticated guest users, such as Healthcare Providers (HCPs) joining via an email link, to access Remote Engagement video calls on an Experience Cloud site, they need specific permissions. The 'Access Remote Engagement for Digital Experience' permission set is designed precisely for this purpose. It grants the Site Guest User the necessary object and field permissions to interact with the Remote Engagement components without requiring a full user login, resolving the "insufficient permissions" error.

A. The Life Sciences Commercial Admin permission set grants administrative privileges, which is excessive and a security risk for a guest user.

B. A license is assigned to a user, not a permission set. The Site Guest User profile already has a specific guest user license.

1. Salesforce Help. Life Sciences Cloud Admin Guide. "Give Guest Users Access to Remote Engagement". This guide explicitly states: "To give guest users access to remote engagement, assign the Access Remote Engagement for Digital Experience permission set to the guest user profile of your digital experience site."