Hi Thomas,
I'm not sure what you are trying to do, but if you cancel the
OnClientAppointmentInsertingevent, the inline edit form won't show. If you don't want to cancel the insert but instead to use the Advanced Edit form, you can just set the properties
StartEditingInAdvancedForm and
StartInsertingInAdvancedForm.
Kind regards,
Kamen Bundev
the Telerik team
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