55-Contact PDC on logon failure

Computer/User Node :

   MACHINE

Policy Path :

   Administrative Templates\System\Net Logon

Supported on :

   At least Microsoft Windows XP Professional or Windows Server 2003 family

Help/Explain Text :

   Defines whether a domain controller (DC) should attempt to verify with the PDC the password provided by a client if the DC failed to validate the password.  Contacting the PDC is useful in case the client’s password was recently changed and did not propagate to the DC yet. Users may want to disable this feature if the PDC is located over a slow WAN connection.  To enable this feature, click Enabled.  To disable this feature, click Disabled.

Registry Settings :

  HKLM\Software\Policies\Microsoft\Netlogon\Parameters!AvoidPdcOnWan