How to Update an Appointment from Exchange Web Service Managed API 2.0 in ASP.NET

Question

iam using the EWS Managed API 2.0 to create an Appontment. It works fine. But want to Update an existing Appointment, too. I read that i need the appointment ID to specify

Answer 1

The temporary unique ID for the AppointmentItem can be retrieved via the ItemSchema's Id property. It should be present after saving the AppointmentItem.

ItemId id = appointment.Id;

The ItemId can change if the AppointmentItem is moved or copied.