I started a transistion from Exchange 2003 to Exchange 2010 without finishing my Exch 2010 book. After I had installed the server with all three roles I read the chapter saying to install the CAS first. What would be my best course of action now. My current Exchange 2003 OWA and Mail server are in the same DMZ and I don't have an ISA server. My owner is too cheap to do it right so I need to make due with what I have. I have another server that I was going to make my new OWA box. Right now none of the mailboxes have been moved except mine and it isn't sending and receiving mail well. It won't let me move it back. I can bring up my mail locally in OWA but it won't display the graphics, just boxes and red Xs.
I am fine with keeping it all the on the same box if I can make it work.