To move all of the guests on your waitlist to the confirmed attendees list, follow the steps below.
1. Head to the Guests tab on your page's editing toolbar.
2. On the left, click the Waitlisted status in the Status column.
2. Select all guests by clicking the top checkbox above your guests' profile icons.
3. In the top bar that appears, click the Change Status button.
4. Select Attending from the dropdown menu.
5. Choose whether to send these guests a new Attending confirmation email and then save. Your waitlisted guests are now on the confirmed attendee list.