By default, Windows Server 2003 refreshes group policy every 90 minutes. This means that if you make changes, you might not see them take effect for up to 90 minutes.

If you want your changes to take effect immediately, you must force a group policy refresh.

To do so, begin by opening a Command Prompt window.

Next, enter:

 gpupdate /force

Windows Server 2003 will now refresh group policy.