My client is running SBS 2003. When it was setup, their IT guy ran CEICW and RWW and OWA worked fine. A few days later (after their old IT guy left) they called me and said they couldn't connect thru RWW or OWA. I tried and got the Welcome screen but when you clicked any link IE was not able to display webpage. I was able to remote in using RDP, however. I ran CEICW again and then was able to use RWW or OWA but only for a day.
They are running SBS2003 (year old install) and a single nic. They have a cable internet connection and are using a Linksys wireless router as a firewall.
Again, I can remote in using RDP but not the web browser. Running CEICW (even just clicking through and not making any changes) allows you to connect but after about a day it "resets" itself.