Is it possible to add new guests to an RSVP after event registration?
Currently this is not possible. The CMS allows for only one RSVP per user for a particular event.
For a user to change the number of guests for an event RSVP, they will need to first cancel the registration and then register again with the new number of guests.
To cancel registration, the user can visit the event page again where the had first RSVP'd (a link to this page is provided in the original RSVP confirmation email). On this page, the user can start the RSVP process again. The system will recognize that they have already have made an RSVP, at which point they are given the option to cancel if they so wish.