From an active conference, select Participants > Invite Participants.
Enter the names, numbers, or email addresses of any Participants you'd like to invite to the conference.
If entering a name, hover over it to reveal the contact's number or email address. Invitations sent to a number are delivered via SMS (5-minute reminder). Invitations sent to an email address are delivered via email (5-minute reminder).
Dialpad Meetings Business accounts must keep the phone number checked to use the dial-out option. Keep in mind that SMS invitations and the dial-out option are only available in the United States and Canada.