We manage several Exch2003,Exch2010Org.
When the sender send mail to other Org , and target Org has the sender contact object.
1. received message from address is resolve to contact object and message include the sender contact object legacyExchangeDN ? ( I think this is both no)
2. If recipient address include target Org contact object,mailbox user object, the received message include recipient mailbox user legacyExchangeDN and recipient contact object legacyExchangeDN ? ( I am not sure about in the received message, recipient contact object smtpaddress is resolved to contact object in targetOrg and the message include recipient contact object legacyExchangeDN ?)