Configure Group Policy so that computer accounts have a maximum password age of 999 days. By default, computer accounts change their passwords automatically every 30 days. If you are saving computer images or snapshots and restoring them later, this setting ensures that the disk images or virtual snapshots will be restorable for up to 999 days.
To Configure the Maximum Computer Account Password Age in Group Policy.
1.In the console tree of the Group Policy Management Editor, open Computer Configuration\Policies\Windows Settings\Security Settings\Local Policies\Security Options.
2.In the details pane, double-click Domain member: Maximum machine account password age.
3.On the Security Policy Setting tab, select Define this policy setting, type 999, and then click OK.
4.Close the Group Policy Management Editor and Group Policy Management consoles.