Exchange 2010 installed on 2008 R2 (virtualised in Xenserver 5.5).
I can access OWA on the LAN without issue.
Attempting to access from the WAN (Internet) results in:
Certificate Error (owa-err-01.jpg),
Certificate Error (owa-err-02.jpg)
Application Error (owa-err-03.jpg)
I am using port 445 forwarded through a Watchguard Firebox to the internal server on port 443.
Port 443 inbound is used for Citrix Secure Gateway traffic.
I am using a self cert certificate.