I recently setup an Exchange server. I have OWA working form both inside and outside the network. While on the internal network I configured my Outlook client to communicate over HTTP and set the proxy address to mail.myco.com. With it configured that way I can use Outlook both on the network and over the network.
Now I would like to setup our external users the same way. I tried to do a manual setup and use the same settings I used while connected to the network. However when I click on the check names button or click next it prompts me for a username and password and will not accept anything I enter. It just keeps prompting me for the log in information
Is there anything else i need to configure?