Microsoft TechNet Article http://www.microsoft.com/technet/prodtechnol/windows2000serv/technologies/activedirectory/howto/bulkstep.mspx contains the following INtroduction:

In this guide, you will perform the following tasks:

Perform batch operations using the LDIFDE utility . Export users from the Marketing organizational unit (OU) in the Reskit domain into a file format compatible with the LDIF standard format. Perform a batch modification of all the users in the Marketing OU. Use LDIF to create a new user and delete a user.

Perform batch operations using ADSI and VBScript . Export users from the Marketing OU in the Reskit domain into a text file, using a script written with ADSI and VBScript. Use VBScript to perform a batch modification of all the users in the Marketing OU. Use VBScript to create a new user and delete a user.