Here is a high-level description of how gold level integration works for adding a new user. For an illustration see, Gold Level Integration with Active Directory Services.
Provisioning:
Add the user to your enterprise user management system.
Your enterprise system contacts AE Services User Management via Simple Object Access Protocol (SOAP) interface, as a normal processing activity, to provide the update.
Authentication:
A user attempts to log in (as a client of the TSAPI Service).
The user is authenticated against the enterprise user management system.
User permissions are derived from the AE Services SDB.