I've recently finished setting up Exchange 2010 and I think i've configured it correctly but I am unable to access OWA from outside of the network.
If I browse to https://webmail.domain.com/owa I get a page cannot be found error. It works with the IP address and doing an nslookup webmail.domain.com is resolving to the correct IP.
I've also had a DNS entry setup for autodiscover.domain.com and that is working perfectly. If I browse to that I am getting the IIS7 holding page.
I've configured the external URL on the CAS server but i'm wondering if I have missed a step.