I am trying to share the primary SMTP namespace between two separate Exchange organizations. I have read http://support.microsoft.com/kb/321721
but still have a question.
From what I have been reading, this can be accomplished in one of two ways. I can either create a new recipient policy and add the primary namespace and then check to have it non authoritative. Or, I can enter the IP or name of the server that will handle mail under “Forward all mail with unresolved recipients to host” under Default SMTP Virtual Server.
I am trying to find if there is any benefit of using one over the other.