Exchange ItemID differs from GlobalAppointmentID for Outlook AddIn
问题 The problem I'm having is that the GlobalAppointmentID of a Outlook Appointement created using a Outlook FormRegion differs from that of the ItemID when using EWS Managed API. I'm creating an Outlook addIn that allows users to add customer and project information to a meeting. The addIn also stores the appointment ID and meeting data in a database and a service will periodically check the ID to update the appointment data. Ok so here is how I use the AddIn: Outlook.AppointmentItem