Having the capability to Accept or Reject the Meeting Invite once a user has been added as an invitee would be helpful in terms of tracking attendance. Users who accepted the invite will be marked as "Attending" prior the meeting, and users who rejected the invite will be marked as "Not Attending". The Meeting Organizer can then confirm their respective attendance during the actual meeting itself. This is a great way to track who will be attending the meeting so that the meeting organizer can modify the meeting agenda based on the availability of other invitees.
