Prevents users from adding directory (ILS) servers to the list of those they can use for placing calls.
Policy path:
Windows Components\NetMeeting 
Scope:
User 
Supported on:
at least Windows NetMeeting v3.0 
Registry settings:
HKCU\Software\Policies\Microsoft\Conferencing!NoAddingDirectoryServers 
Filename:
conf.admx 
