I just installed a SBS 2003 server with exchange on a single server. What Anitvirus protection product should I install on the server to protect it and exchange
The home products aren't compatible with servers I'm afraid, only the Enterprise ones are and they involve multiple licensing.
Total Protection Service (TOPS) may also be eligible for a server environment and it is in Beta at present.
Try the second link on this page for that: http://community.mcafee.com/thread/13215