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Contact PDC on logon failure

This policy setting defines whether a domain controller (DC) should attempt to verify the password provided by a client with the PDC emulator if the DC failed to validate the password. Contacting the PDC emulator 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 emulator is located over a slow WAN connection. If you enable this policy setting the DCs to which this policy setting applies will attempt to verify a password with the PDC emulator if the DC fails to validate the password. If you disable this policy setting the DCs will not attempt to verify any passwords with the PDC emulator. If you do not configure this policy setting it is not applied to any DCs.


Additional Information

  1. Registry path is:

    HKEY_LOCAL_MACHINE -> Software -> Policies -> Microsoft -> Netlogon -> Parameters # AvoidPdcOnWan

  2. The Administrative Template path is:

    System -> Net Logon

Notes

* Making mistakes while changing registry values can affect your system adversely. We recommend you to create a System Restore point before making registry manipulation. If you're new to Registry Editor, read this beginner's guide.
** To locate the registry and administrative template path, checkout beginner's guide.
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