Hi there, I will try to explain what they asked me, I don't even know if it's possible to achieve.
We have an external mail server (not Exchange) where all the mailboxes are, and it's the one used as MX record, so the world will send emails to us to this server.
There is a rule on this server, so that every received email will be forwarded (a copy) to our Exchange 2010 server (no MX record associated, the rule specifies the IP address).
Now, when people using OWA or Outlook send "internal" messages using Exchange, these messages will be delivered (I guess) using some sort of internal system, straight to the Exchange mailbox, leaving the external server out. Some people only use the external server, or would like to have a copy there. Is it possible to achieve this?
From what I can guess, if I forward an email to the external server, the mentioned rule would forward it again to Exchange?
The 2 servers share the same domain, so all mailboxes are like email@example.com in both servers.
Can someone help me with this, please?
Thanks in advance,