1. On the event dashboard, click on "Agenda" from the left sidebar menu.
2. Click on the settings tab under the agenda feature page.
3. Turn on "Let attendees RSVP" toggle to allow attendees to RSVP.
4. Click on "Save settings" to save the changes.
Note: Attendees should now see the option to RSVP for sessions in the event app. When they RSVP to a session, it’ll automatically appear under the "My sessions" section for easy access.