While in a Web conference, click InviteParticipants in the Meeting menu. A dialog box open that enables you to send e-mail invitations for this conference.
Click Invite Participants from the Meeting menu. The invitation dialog box opens.
Type the e-mail address of the person you want to invite in the E-mail Address box. If you invite more than one person, press ENTER after each e-mail address. box.
Click Send Invitation. The participants are invited to the current Web conference.