Thank you for your question.
In order to prevent deleting of appointments, you should just subscribe to the AppointmentDeleting
event and cancel it.
I hope this helps. Feel free to ask if you have any additional questions.
the Telerik team
Register for the Q2 2011 What's New Webinar Week. Mark your calendar for the week starting July 18th and book your seat for a walk through of all the exciting stuff we will ship with the new release!