To Export All available user info in a domain into a excel sheet:

- Open command prompt in Admin mode and type the following:

C:\Documents and Settings\Administrator\Desktop>ldifde -f exportOut.xls -s DOMAIN_NAME

Useful links:

http://support.microsoft.com/kb/555636
http://www.activewin.com/win2000/step_by_step/active_directory/bulksteps.shtml