As described in the ATG Personalization Programming Guide, the standard profile supplied with the ATG platform contains properties such as first name, last name, login, and e-mail address. Other ATG applications add their own properties to the external profile definition.

The extensions that each application makes to the external profile definition are stored in that application’s ExternalUsers sub-module. Including these modules when you start each application allows Business Control Center users on different servers to see all the profile properties added by other applications. For detailed information, refer to Sharing External Profile Definitions Across Multiple Applications in the ATG Multiple Application Integration Guide.