Ok experts here is my thing. I have been asked by the powers that be, to setup our exchange server to host the email for multiple child companies. (They all have different domain names. company1.com , company2.eu, etc) That's all fine and Dandy. I have exchange setup and working for the domains, and mail flows nicely. But the thing is, they have now come to me and stated they want to be able to do SSL encryption on the emails, and setup RPC/HTTPS like I had setup and running on our primary domain already. Is it simply a matter of purchasing the proper SSL certificates for the websites, installing those certificates into the ISA Certificate Store, and then on the Exchange server as well? I have been reading an article from Thomas Shinder, in which he has multiple systems setup as a DC, CA, and Exchange server all on the same box. Seeing as I am running this setup on an ESXi Server anyways, would that be the best route for me to follow? A separate DC,CS, and Exchange server behind the ISA 2006 machine for each and every email domain they want me to host?
I currently have the following rough setup.
An AD with 2 DCs (redundancy) with multiple UPNs for each of the email domains.
A Front End Exchange Server
A Back End Exchange Server setup with receipient policies for all of the domains we want to host
Any help or a point in the right direction would be greatly appreciated.