StorageItem.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 StorageItem object.
Remarks
If you use the UserProperties.Add method on the UserProperties object associated with a StorageItem, the optional AddToFolderFields and DisplayFormat arguments of the UserProperties.Add method will be ignored. Any custom properties of the StorageItem object will not be exposed as custom properties in the Field Chooser.