I want to be able to use the Exchange 2010 OWA with mailboxes on an Exchange 2007 server.
I want to maintain my mailboxes on the 2007 server and maintain my 2007 HUB/CAS role. My setup is all Windows 2008 x64 servers, 3 Exchange 2007 servers (2 mailbox servers (CCR Active/Passive clustering) and 1 HUB/CAS server).
My goal is to maintain the current environment and have all the mailboxes on 2007, maintain the 2007 HUB/CAS for mail flow and for mobile phone access (2010 is still buggy with some mobile platforms) and have a NEW Exchange 2010 CAS server that only acts as a web portal for mail (the 2010 OWA blows away the 2007 OWA as you are not required to use IE to get real features). This will run on a separate internal server and use a separate hostname from the inside and outside.
Right now I have everything running, the 2007 servers and the 2010 with ONLY the CAS role installed. My problem right now is when I access the 2010 OWA and log in, it opens up the mailbox using the 2007 version of OWA.
So with all that said, is what I am trying to do possible?
I did find http://serverfault.com/questions/124218/it-is-possible-to-use-the-exchange-2010-web-client-with-an-exchange-2007-mail-ser as a relevant post but with no real help except a link I have already read over in my few hours of research into this.
Any help is appreciated.