full name ang user name of the employees in the server

hi good day.I need to submit a report from our Head office the list of all the employees name that is listed in our server.like the user name and the full name. i have to do it manually in every department. Is there any query from the server or any possible way to take the names of the employees. im using 2000 server,exchange server. pls help me in this issue.
thanks