I have an Exchange 2010 (MB,HT,CAS) Server and an Exchange 2007 (HT, CAS) Server. Currently client OWA requests are targeted directly to the Exchange 2010 CAS via https://mail.domain.com/owa or via https://192.168.0.10/owa. We want to cluster the two hub transport servers into one and NAT it out to a public IP. At the same time we want client OWA requests to be directed only to the Exchange 2010 server. How can we achieve this with minimal configuration. Thanks.

Hi, You can't cluster an exchange 2007 server and an Exchange 2010 server. What is your exact goal. There might be other ways to get there. Leif

To have a common IP for each of the servers since I want to utilize both transport servers and then have a cname for both servers; thus I can NAT out that IP unto the internet. But at the same time direct all OWA request to the Exchange 2010 CAS. Thanks.

Hi, You don't need any clustering for that (at least not in most companies). You just create a send connector on both HUB transport servers, allow TCP port 25 to the internet from both servers and you should have what you are looking for. No DNS record is needed for this Leif