The problem is that internal users receive errors when they navigate to the SharePoint 2010 site without using https://. The following occurs when I browse to my internal https SharePoint site without using http(s). I receive the IIS 7 logo or the error ‘Internet Explorer cannot display the webpage’:
You can redirect http traffic to https using IIS.
Create a new IIS Site that uses port 80
Create a redirect that points to the https version of the site.
Grant ‘everyone’ read permissions on the newly created IIS Web folder
Enable directory browsing for the newly created IIS site
Perform an IIS reset and internal users will be forwarded to the https version and they wont receive errors anymore.