The following procedure shows you how to apply an existing Group Policy object (GPO) to managed Windows Mobile devices in an organizational unit (OU) by linking the GPO to the OU.
To link an existing Group Policy object to an organizational unit
In the Group Policy Management Console, locate the OU that contains the managed devices that you want to target.
Right-click the OU and then select Link an existing GPO. The Select GPOdialog box appears.
In the dialog box, select the GPO that will be applied to the managed devices, and then choose OK. The GPO is displayed in the details pane on the Linked Group Policy Objectstab.