I can retrieve the Appointment.TimeZone of the project:
PropertySet propertiesAll = new PropertySet(BasePropertySet.IdOnly, … , AppointmentSchema.TimeZone, AppointmentSchema.StartTimeZone,
I can retrieve the Appointment.TimeZone of the project:
PropertySet propertiesAll = new PropertySet(BasePropertySet.IdOnly, … , AppointmentSchema.TimeZone, AppointmentSchema.StartTimeZone,