The following are the properties for the messaging user originally intended to be the recipient:
PR_ORIGINALLY_INTENDED_RECIP_ADDRTYPE
PR_ORIGINALLY_INTENDED_RECIP_EMAIL_ADDRESS
PR_ORIGINALLY_INTENDED_RECIP_ENTRYID
PR_ORIGINALLY_INTENDED_RECIPIENT_NAME
For more information on the address properties, see Base Address Properties. Note that PR_ORIGINALLY_INTENDED_RECIPIENT_NAME is not one of the address properties.
For more properties related to autoforwarding, see Alternate Recipient Properties and Autoforwarding Properties.