External user maintenance is similar to Internal Users, but external users do not have certain options enabled (they cannot be administrators, or design tool users, for example), and do have an Entity ID field that is required. Documents also have an Entity ID field, and external users can only view documents with a matching Entity ID value.
External users may be members of groups, and granted explicit access to certain libraries, but are only granted Read access to those libraries. Any library access must be explicit for the user or groups the user is a member of. Default library access, applicable to internal users, does not apply to external users.
