Click Notify Guests . When changing the date, time, duration, or frequency of a meeting, Meeting Maker removes the meeting from your guests' schedules, and notifies all guests. If you change the guest list, agenda, location, or meeting title, Meeting Maker notifies all guests. The changed items are underlined in the meeting proposal. When changing meeting options, the changes appear on your calendar, but not on guest calendars.
Guests can modify options for themselves.