To add/create users in Windows 2003 Server, please follow these steps.
1. Click the Start button, then Run.
2. Then type lusrmgr.msc.
3. Right click in the right panel and click “New User”
4. In the New User dialog, type in the new user name and password.
5. Uncheck User must change password, and check Password never expires.
NOTE: This will only create the user. This will not give direct server access to the created user. If you want to give the user ability to remotely login into the server. Then you need to provide appropriate permissions.