How to Import User Profiles
You can import user profile data from external systems by using the following methods:
Attach user profile information to existing data. You can do this by using the aggregation feature of the Profiles Schema Manager. If you use this option, you would treat the existing data as any other data source.
Import the data into the Profiles Schema Manager. The Profiles Schema Manager provides an OLE DB interface that you can access by using ADO.NET and perform simple SQL statements such as insert, update, delete, and select.
For more information and instructions about how to import user profiles, see How to Import Profile Schema.