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Thursday, November 27, 2014

iCal - Cancel 1 meeting from recurring meetings

I was working on generating an iCAL invite from a calendar item and was having difficulty deleting once of the event from series.

I found that you have to generate the same ICAL invite that you did for recurring event but there will be two things different
  1. Add Recurrence-ID;Value:DATE=yyyyMMDD (your get the value from SPListItem["ReucurrenceID"])
  2. Change the METHOD in your email and ical content to CANCEL
  3. Increment sequence parameter
Once you adjust your cancel invite with these three changes, your email will show remove from calendar link and clicking on it will only remove the event specified in Recurrence-ID.

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