We are sorry for the delayed reply.
It is expected behavior that when an appointment is disabled a tooltip would not appear on mouse over. If you want appointments to appear as disabled but still show the tooltip, you could try preventing the EditAppointment dialog from showing. This will prevent an appointment from being edited.
You can cancel the dialog using the AppointmentEditing
event and set e.Cancel = true
You can find more details here
In the same manner you can also cancel the deletion of appointments via the AppointmentDeleting
event. More on RadScheduleView events can be found here
I hope this helps.
the Telerik team
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