Question : External OWA Access

Hi I just setup my exchange server and am able to send and recieve mail fine.  I am running Exchange 2007 SP1 and Windows Server 2008 with IIS7.  I am having trouble getting the external URL for owa to work.  I am using a dynamic DNS service and have added the A record for the URL and entered it into the external url property in exchange but no luck.  Any help with this would be greatly appreciated.

Answer : External OWA Access

oops, forgot to include the word "interface" between tcp and the port number. So it should read instead:

static (inside,outside) tcp interface 443 443 netmask 255.255.255.255

Everything else stays the same.