I have set up my VPN just fine and can connect OK. I also set up the Remote Web Workplace page and can access the page just fine within my network but when trying to access from a remote location I get 404 - File or directory not found.
On the IIS7 when running a test for the website I get the following message:
The server is configured to use pass-through authentication with a built-in account to access the specified physical path. However, IIS Manager cannot verify whether the built-in account has access. Make sure that the application pool identity has Read access to the physical path. If this server is joined to a domain, and the application pool identity is NetworkService or LocalSystem, verify that <domain>\<computer_name>$ has Read access to the physical path. Then test these settings again.