I am preparing to transition to Exchange 2007. The Exchange 2007 environment is built, and I am getting connectors set up. I want to set up the send connectors up in parallel with the existing exchange 2003 connectors so that if the mailbox is on exchange 2003 it will use the internet connector on exchange 2003, and if it is on exchange 2007 it will use the send connector on exchange 2007. Basically I just created an identical internet connector on exchange 2007 with the same cost. My assumption was that because the routing group connector between exchange 2003 and exchange 2007 has a cost this would have my desired result. ALL of my mail traffic from exchange 2007 mailbox goes directly over to exchange 2003 instead of using my send connector on exchange 2007.
I put in a random domain on my exchange 2007 connector that was not directly used in an exchange 2003 connector and tested an email, and it went out my exchange 2007 connector. I thought I would be able to set it up like this so that as I move mailboxes over to exchange 2007 they will start to use the new connectors, instead of moving all mailflow at once.
Can someone explain to me why this won't work, or what I might need to do different to accomplish my goal?