For security reasons you may wish to delete the call history record that netmeeting keeps. This, however, requires that you edit the registry. As with all registry alterations it is wise to backup your registry before attempting any alterations.
1/ Click the Start Button.
2/ Next Click Run.
3/ In the Run dialog box type: Regedit
4/ In the Regedit window navigate to HKEY_CURRENT_USER\Software\Microsoft\Conferencing\UI\CallMRU
5/Click on CallMRU.
6/ On the right of the registry window will be a list of your calls. Right click on each call entry in turn and press Delete.
7/ You will be asked to confirm each deletion. Press OK to confirm.