Mailboxes migrated from Exchange 2003 to a new Exchange 2007 server are no longer working

Question

I have an Exchange 2003 server running on Windows 2003 server.  I setup a new Windows 2003 x64 server and installed Exchange 2007 on this server.  I have migrated some email accounts that were working on my Exchange 2003 server to the new Exchange 2007 server and they are no longer working ... By this I mean, they are not able to have SMTP mail delivered to the mailboxes on the 2007 server.

From the new Exchange 2007 Management Console, I migrated all of the mailboxes back to the Exchange 2003 server and right away started getting email delivered to these mailboxes.

I would appeciate any help on how I can get the new Exchange 2007 server to deliver email to mailboxes migrated to the new server.

Thanks,
Dean Henderson

Answer 1

As a follow-up:

In sending test email to one of the Exchange 2007 homed mailboxes, I found the email in the Queue folder of the Exchange 2003 server ... Please this server generated a notification saying the email was delayed. 

So, it would appear I do not have a proper configuration for routing emails between the Exchange 2003 server and the Exchange 2007 server.

Answer 2

While looking for information about why routing does not appear to be working, I found a link showing the following Exchange command shell cmdlet that corrected my problem:

New-RoutingGroupConnector -Name "Interop RGC" -SourceTransportServers "Ex2007Hub1.contoso.com" -TargetTransportServers "Ex2003BH1.contoso.com" -Cost 100 -Bidirectional $true

The description for this cmdlet is at the following link:

http://technet.microsoft.com/en-us/library/aa998574.aspx