DocumentItem.UserProperties Property (Outlook)
Returns the UserProperties collection that represents all the user properties for the Outlook item. Read-only.
Syntax
expression .UserProperties
expression A variable that represents a DocumentItem object.
Remarks
Even though olWordDocumentItem is a valid constant in the OlItemType enumeration, user-defined fields cannot to be added to a DocumentItem object and you will receive an error when you try to programmatically add a user-defined field to a DocumentItem object.