Disable remote Desktop sharing
Computer Configuration\Administrative Templates\Windows Components\NetMeeting
Disables the remote desktop sharing feature of NetMeeting. Users will not be able to set it up or use it for controlling their computers remotely.
The NetMeeting folder containing this policy is created by the Conf.adm administrative template. Conf.adm is included in Windows 2000, but does not load in Group Policy automatically. To display the NetMeeting folder, add the Conf.adm administrative template to Group Policy.