This works fine but the unintended consequence seems to be that after changing the default to the custom form that launches a meeting request with out responses, now when clicking on New Appointment launches a meeting request instead of an appointment window which usually comes with a "Save and Close" button and no attendee box (just Subject and Location). Before changing the default form, the "New Appointment" button launches an appointment window and the New Meeting button launches a meeting window. The difference between the two is that the latter has a "To:" box to enter attendees and a "Send" button replacing the "Save and Close" button. Why would changing the default form in the way described in this article also changes an appointment into a meeting request? It does not seem like the right approach to solve the issue with making the "no response" meeting request the default for meeting requests.