To set up a group policy in Active Directory, add a Group Policy Object Editor snap-in to the Microsoft Management Console. Open the MMC by clicking Start, Run, typing "mmc" in the text box, and clicking OK. On the MMC, select File in the menu and click Add/Remove Snap-in. Click the Add button on the Standalone tab, select Group Policy Object Editor in the list of available snap-ins, and click Add.
Once you have added the Group Policy Object Editor snap-in, browse for the Group Policy object you want to edit in the Select Group Policy Object box. You can now edit the Group Policy object in the Group Policy Object Editor.
Alternatively, you can open the Group Policy Object Editor from the Active Directory Sites and Services console. On your computer, click Start, select Control Panel, double click Administrative Tools and then Active Directory Sites and Services. From the console, select the website for which you want to set up the Group Policy, right click, select Properties and then Group Policy. On this tab, you can create a new Group Policy object or edit an existing one. You can also access the Group Policy Object Editor from the Active Directory Users and Computers console, select the domain for which you want to set the policy, right lick, and select Group Policy.