Is there a way to admit attendees into a waiting room, and admit them all at once at the start of a webinar? The first webinar we did, we were doing lots of coordination and didn't realize that attendees joining could hear all the prep. It came across as very unprofessional.

If there is a way to activate a waiting room, great. If not, we need to do a lot more planning to ensure we can get the webinar working without the ability too coordinate.