Workgroup Manager client computers that are set up to get their configuration from a Managed Client Server (Mac OS X Server 10.2 or later) and show a list of users, do not show all the user accounts that exist in the server's database.
Solution
The list of computers in Workgroup Manager must be set to "Define" for the affected group of computers. By default, Workgroup Manager only has a Guest computer list, and preferences are not defined.
2. Click the Computers tab.
3. Either set up a specific group of computers, or use the Guest computer setting.
4. Click the desired computer list.
5. Click the List tab.
6. Click Define.
7. Click the Access tab. You may choose to allow all groups to use the computer, or you can restrict only certain workgroups to the list.