This policy setting allows local users to be enumerated on domain-joined computers. If you enable this policy setting, Logon UI will enumerate all local users on domain-joined computers. If you disable or do not configure this policy setting, the Logon UI will not enumerate local users on domain-joined computers. Counter Measure: Disable this policy setting. Potential Impact: If you enable this policy setting, Logon UI will enumerate all local users on domain-joined computers. If you disable or do not configure this policy setting, the Logon UI will not enumerate local users on domain-joined computers." Fix: (1) GPO: Computer Configuration\Administrative Templates\System\Logon\Enumerate local users on domain-joined computers (2) REG: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\System!EnumerateLocalUsers