By default, all computers in an AD domain attempt to refresh their Group Policy settings every 90 minutes, with a 30-minute offset. This is extended to limit the peak amount of network bandwidth that is consumed when refreshing the Group Policies. By default, the Group Policy is also updated at every boot of the OS. The following steps outline how to change the Group Policy refresh interval:

1. Using the Group Policy console, edit the local desktop or domain-based Group Policy.
2. Select the Computer Configuration | Administrative Templates | System | Group Policy policy object.
3. Double-click on the Group Policy refresh internal for computers policy to open the policy properties window.
4. Click on the Enabled radio button to enable the policy.
5. In the Options area, configure how often the Group Policy will be applied to the computer by providing a value for the Minutes field.
6. In the same area, set the amount of random time to be added to the Group Policy refresh interval by providing a value for the Minutes field. This randomizes the policy refresh interval to prevent the desktops from refreshing the policies at the same time.