This policy setting determines how far in advance users are warned that their password will expire. Microsoft recommends that you configure this policy setting to 14 days to sufficiently warn users when their passwords will expire. Countermeasure: Configure the Interactive logon: Prompt user to change password before expiration setting to 14 days. Potential Impact: Users will see a dialog box prompt to change their password each time that they log on to the domain when their password is configured to expire in 14 or fewer days.

[max days]

(1) GPO: Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\Interactive logon: Prompt user to change password before expiration (2) REG: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon!passwordexpirywarning