The following are the address properties for a messaging user being represented by the receiving user:
PR_RCVD_REPRESENTING_ADDRTYPE
PR_RCVD_REPRESENTING_EMAIL_ADDRESS
PR_RCVD_REPRESENTING_ENTRYID
PR_RCVD_REPRESENTING_NAME
PR_RCVD_REPRESENTING_SEARCH_KEY
For more information about how these properties are used, see Delegate Access.
For more information on the address properties, see Base Address Properties.