My OWA works fine within our LAN, however when you try to access the page from outside (internet) we cannot reach it. I have a public IP address bound to our exchange server. I think everything is in place so why is it that I get a page cannot be found error when I attempt to access it from outside? I have a feeling that maybe the firewall is blocking the traffic. Are there any specific ports that I need to open up on the firewall to allow specific traffic to the exchange server(port 80 maybe?)Thanks in advance...