On Domain controllers, Microsoft Windows does so every five minutes.During the refresh, it discovers, fetches and applies all GPOs that apply to the machine and to logged-on users.Some settings - such as those for automated software installation, drive mappings, startup scripts or logon scripts - only apply during startup or user logon.
As part of Microsoft's Intelli Mirror technologies, Group Policy aims to reduce the cost of supporting users.
Intelli Mirror technologies relate to the management of disconnected machines or roaming users and include roaming user profiles, folder redirection, and offline files.
To accomplish the goal of central management of a group of computers, machines should receive and enforce GPOs.
A GPO that resides on a single machine only applies to that computer.
To apply a GPO to a group of computers, Group Policy relies on Active Directory (or on third-party products like ZENworks Desktop Management) for distribution.
Active Directory can distribute GPOs to computers which belong to a Windows domain.
By default, Microsoft Windows refreshes its policy settings every 90 minutes with a random 30 minutes offset.
Group Policy is a feature of the Microsoft Windows NT family of operating systems that controls the working environment of user accounts and computer accounts.
Group Policy provides the centralized management and configuration of operating systems, applications, and users' settings in an Active Directory environment.