A list of contacts can be added to received items. In GroupWise windows client, open a received item and click on the personalize tab. Notice that you can add a list of contacts to this item. This personalization is useful to link specific items to a contact. To see this linkage, open a contact and view the history tab.
<ContactRefList> <contact type="uid" minOccurs="0" maxOccurs="unbounded"/>
Unique id for a contact.