Returns the unique entry ID of the object. This property corresponds to the MAPI property PR_ENTRYID. MAPI systems assign a permanent, unique ID string when an object is created that does not change from one MAPI session to another. The EntryID property is not set for an Outlook item until it is saved or sent. Also, the EntryID changes when an item is moved into another folder.
Read-only String.
Syntax
object.EntryID
object Required. An expression that returns an Outlook object that is listed in the "Applies To" list.