To use a directory server to place calls

From NetMeeting 3.0 Help

To use a directory server to place calls

On the Tools menu, click Options.
On the General tab, under Directory Settings, in Directory, type or click the name of the directory server you want to use.

Notes

If you are not logged on to the directory server, you can still be reached if people have your IP address.
If you want to log on automatically, select the Log on to the directory server when NetMeeting starts check box.
If you do not want your name and e-mail address to appear in the directory list when you are logged on to the directory, select the Do not list my name in the directory check box.