Recurring Appointments/Meetings - Saving UserProperties Doesn't work

Question

Hi Guys,
I have the issue below, any help would be really appreciated!
The Aim
When a user creates or saves a new Appointment or Meeting or Reccuring Meeting, I want to set a UserProperties with some unique data.
Current Situation
I currently have a Appointment Inspector class which has an Item_Write event subscriber that is triggered when the user clicks on Save or Send etc. I am able to set the UserProperties property within this. 
Within the Outlook Addin.cs, I am monitoring all ItemAdded
& ItemChanged events on the Calendar Folder. These trigger as expected when any appointment or meeting is created. 
The Problem
The functionality works fine for single appointments but doesn't Recurring Appointments/Meetings. When I set the
UserProperties property within the Item_Write, I want it to happen to all occurances.
I have checked the User Property value within the ItemAdded &
ItemChanged events, which execute after the Appointment Item_Write. And it seems that the property is
NULL.
Any ideas?

Answer 1

Hello,
If you need to add the same user property to all occurences of the recurring appointments/meetings you can use the
GetRecurrencePattern  method which returns a RecurrencePattern object
that represents the recurrence attributes of an appointment. The RecurrencePattern class provides the GetOccurrence method which returns a specific instance of the AppointmentItem object
on the specified date where  you can add a user property.
Also you may consider setting the property on the parent appointment item for the series. The
Parent
property of the ApointmentItem returns the parent AppointmentItem for the recurring instances and exceptions.