_AppointmentItem.GlobalAppointmentID Property
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Returns a String (string in C#) value that represents a unique global identifier for the AppointmentItem object. Read-only.
public:
property System::String ^ GlobalAppointmentID { System::String ^ get(); };public string GlobalAppointmentID { get; }Public ReadOnly Property GlobalAppointmentID As StringProperty Value
Remarks
There are situations where the entry ID of AppointmentItem objects may change, such as when an item is moved to a different folder or to a different store. Entry IDs can also change when a user performs certain functions in Outlook, such as exporting and then reimporting data.
Therefore, each Outlook appointment item is assigned a Global Object ID, a unique global identifier which does not change during those situations. The Global Object ID is a MAPI property that Outlook uses to correlate meeting updates and responses with a particular meeting on the calendar. The Global Object ID is the same across all copies of the item.