Thanks a lot for replying. Dhana just left from office, I spoke to her and this is the update
For normal appointment(non-recurring appointment), the serverside event radschedular_AppointmentDelete fires. It works fine.
But while deleting recurrence appointment, no server side event is fired.
Including raschedular1_OccurrenceDelete(object sender, OccurrenceDeleteEventArgs e)
Let us know if you have any hints/clues.
Thanks a lot for the quick response.