Yesterday I got a problem of hiding desktop on a domain. Many companies do this at their domain. We can do these using active directory group policy. To do such things we can follow the following steps on your AD server.
1. Click Start, click Run, and then type gpedit.msc.
2. Under Local Computer Policy, expand User Configuration, expand Administrative Templates, expand Desktop, and then click Active Desktop.
3. Double-click Active Desktop Wallpaper.
4. On the Setting tab, click Enabled, type the path to the desktop wallpaper that you want to use, and then click OK.
I worked like this on my domain. The server OS is Windows 2003 server.
Hope that it may come useful to you. I need your suggestion and tips regarding active directory as I am a new at windows AD.