I am running Exchange 2007 on MS Server 2003 R2 Standard - both fully updated. Due to another software failure, I had to uninstall all .Net components. Concurrently, I installed Exchange 2013 on another server, which required some changes to the domain. During this time period OWA stopped working (having previously worked fine for years). After many attempted fixes, I uninstalled and reinstalled the Exchange Client Access Role and IIS. I can now access OWA internally via https://servername/owa
, but cannot access OWA externally via https://mail.publicname.org/owa
. I have a SonicWall TZ215 firewall, but no changes have been made to it during this process, so I do not believe it is a firewall issue. I can ping the public IP and the mail.publicname.org externally. Attempting to access OWA externally gives me an error: "Internet Explorer cannot display the webpage." I can telnet to ports 80 and 443 internally, but not ports 80 or 443 externally, which MAY be a firewall issue. I suspect this is an IIS issue.