Here's the layout.
I have a Sprint T1 that comes in on one firewall which host exchange and corp website. I have a second firewall with Comcast that is used primarily for internet access to LAN users.
I'm trying to set up OWA to come in on the Comcast firewall because the Sprint firewall is already using port 443 for corportate website. I have created a subdomain with Sprint (owa.company.com) that points to my Comcast IP.
I have opened 443 on the Comcast firewall to allow SSL traffic. I can see requests hitting and allowed on this firewall but nothing seems to be hitting the exchange server. Hence no OWA access.