Rolling Back and Rolling Forward
When a GPO within AGPM is edited, a copy is placed in the archive. This feature allows for an excellent backup and restore process—all GPOs are backed up automatically and can be easily accessed at any time for restoration.
Whenever you edit a GPO, a copy is automatically saved; this process cannot be altered. To see how the automatic backup process works, follow these steps:
In the GPMC, click the Controlled tab in the details pane.
Right-click the GPO in the list that you want to edit, and then click Check Out.
(Optional) Type a comment in the Comment box, and then click OK.
After the GPO is checked out, click Close.
On the Controlled tab, right-click the GPO in the list again, and then click Edit.
Make any modifications ...