how long does group policy update take
This policy specifies a background update rate only for Group Policies in the Computer Configuration folder. By default, computer Group Policy is updated in the background every 90 minutes, with a random offset of 0 to 30 minutes. In addition to background updates, Group Policy for the computer is always updated when the system starts. You can specify an update rate from 0 to 64,800 minutes (45 days). If you select 0 minutes, the computer tries to update Group Policy every 7 seconds. However, because updates might interfere with users' work and increase network traffic, very short update intervals are not appropriate for most installations.