I am currently experiencing problems with configuring Outlook Web Access using Exchange 2K and ISA2K. I have a domain name pointing to the IP Address of the external ISA interface. Our ISP has created A Host record for this domain. I have followed the article http://www.isaserver.org/tutorials/Publishing_Exchange_2000_Outlook_Web_Access_with_ISA_Server.html and created a destination set based on the publicaly available domain. Also I have published OWA site using New Web Publishing Rule wizard. In the rule wizard I ticked the options Reditect the request to this internal web server (Typed the FQDN of our Exchange server) and Send the original host header to the publishing server instead of the actual one. The Exchange Server is SecureNAT client and it has internal DNS entries. When I connect to this OWA site it comes up with an error "Cannot connect to the server or DNS error". I don't know where I am going wrong. When I ping my publicly domain name and it does bring up the response with the IP Address of our External ISA interface. Don't know what I am doing wrong. Please help.