Question : Exchange 2010 External OWA Problem

I have just set up Exchange 2010 and am trying to get OWA to work correctly. It will work from the LAN with https://servername/owa. It does not work from https://webmail.mycompany.com. I have a public DNS record set and a NAT Policy to convert the public IP to the private IP. I cannot get the external URL to work from either external or internal. Anyone know why this could be?

In the install, I did not specify this as Internet facing. But I figured as long as specified the OWA external address in the EMC that it should still work.

Answer : Exchange 2010 External OWA Problem

you mentioned here http:#33544718 that 443 fails, hence I wanted to focus on firewall and see if NAT is working and forwarding 443 to exchange internal IP.

UCC/SAN Cert - is required for autodiscover and other exchange services.
You can get one from digicert here
www.digicert.com/easy-csr/exchange2007.htm

or Godaddy.