Exchange Server 2003 and 2007 Coexistance

[DRZ]

Guys, I have an issue with my Exchange environment that I need a little help with!

In theory, what I am trying to do is simple and what I have done should have worked, but it hasn't so here is the situation:

Windows server 2003 SBS, Exchange 2007 on Server 2008.

SBS 2003 has all 5 FSMO roles back again after the 2007 install. I have 20 mailboxes on the 2003 server and have migrated one of them over to the 2007 server. I have created a routing group connector between the two servers from PowerShell on the 2007 server.

Mail enters the organisation through the 2003 server and thats as far as it goes at the moment. Mail makes it to the local mailboxes but not to the mailbox on the 2007 server.

However, if I mail a user that has a mailbox on the 2003 server from the 2007 server, it gets there down the RGC (I haven't set up any outbound connectors yet).

What is going wrong here? I've read up on it and everything seems to indicate that my setup is correct but perhaps its to do with the fact its an SBS server not the normal setup?

 

[DRZ]

This is a supported upgrade path, coexistance is supported for SBS and Exchange 2007, you only run into difficulties with all 5 roles not being on the SBS, which I have circumvented in the supported way.

The idea is obviously to move away from 2003 altogether, but slowly as we have a lot of applications tied into 2003/Exchange at the moment and its less painful to migrate this way than it would be to jump straight to 2007.

 

[DRZ]

I got to the bottom of the problem in the end, the RGCs you create with powershell assume (and there appears to be no way of changing this!) that you use the Default Virtual SMTP Server. We were not using this because there was some sort of historical fault with it, so mail was just sitting there.