We have a Win2k3 Server acting as DC and Exchange 2003 server for 25 users. We've been using OWA exclusively in the office for a month now with good results. I've opened up port 80 (and 443 for SSL to be implemented later) for testing and using the site is excruciatingly slow from high speed connections (tested 3 different outside connections). I notice that if I log into OWA remotely, it does ok until I do something (like send an e-mail). If I then click on 'Inbox' The middle pane says 'Loading' and remains like that (for 30mins anyway after which time I gave up). I've read all the other slow OWA threads but to no avail. Most slowness problems seem to involve SSL, which we haven't installed yet. I've done the certificate request in IIS, but haven't installed it yet. Any suggestions?
Edit: If I get stuck on the inbox 'loading' and then close IE, log in again everything is fine (loads ok) until I do it again.