I've previously configured OWA 2003 without any great difficulties. Now I have a single SBS 2003 on which I need to have OWA working and it's giving me grief. No FE/BE architecture. Single domain, single server, less than 10 users.
it's pretty simple: Browse to http:\servername\exchange\owa
and the login page comes up, no problem (after the usual certificate error). I enter a username and password. Then I get "Page cannot be displayed" Error 404.
Thinking it might be a network problem, I tried accesing it right on the SBS 2003 box but get the exact same problem (login page, enter username/password, error 404).
I've gone so far as to setup a test server with a fresh install of SBS 2003 and get the same thing.