One new feature in Windows Server 2008 R2 / Windows 7 is the ability to configure your internal certification authority hierarchy in order to issue certificates that can show as Extended Validation certificates. This means that you’ll get a shaded green bar within Internet Explorer proving that a site is ‘extra trustworthy’. Learn more about extended validation here. The feature works on the following operating system / IE Versions: Windows XP SP3/ 2003 SP2 – Internet Explorer 8, Windows Vista SP1/Windows Server 2008 – Internet Explorer 7 and 8, Windows 7/2008R2 – Internet Explorer 8.
Follow here to create a new “Issuance Policy” on a certificate template to support EV certificates, and to create / modify a Group Policy to support the feature.