Disable application Sharing
User Configuration\Administrative Templates\Windows Components\NetMeeting\Application Sharing
Disables the application sharing feature of NetMeeting completely. Users will not be able to host or view shared applications.
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.