An online meeting service is configured to determine whether a prospective meeting participant is among a known group of trusted users (e.g., logged in to a trusted domain). If the prospective meeting participant is validated as a trusted user, they may join a meeting without additional steps. If the prospective meeting participant is not validated as a trusted user, they may consent to have the meeting organizer view them through their camera in order to confirm that they may have meeting access. If the organizer recognizes the prospective participant through the camera image (still or video), the organizer may admit them to the meeting.