I am using SOAP in order to get all appointments from all the users and I need to track down changes made to an appointment (ex. rescheduling an appointment).

I use getItemsRequest to get appointments and in the view I specify to return the "changes" property, however this property is always null.

My view contains the following properties:
"default peek @type message startDate endDate recipients recipientStatus changes update frequency"

Any ideas why the "changes" property is null? Or what other way there is to get the changes? Because I noticed that when an appointment is rescheduled it's id is changed and I would need a link to the initial id/appointment?

I also tried the "threading" property which is also null.

Thank you.

I use GW 8.0.1