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In a CIFS environment, with only RODC, Kerberos communication is not working

Last Updated:

Applies to

  • ONTAP 9
  • CIFS
  • Domain Controller (DC)
    • ReadOnlyDC (RODC)
    • ReadWriteDC (RWDC)
  • Kerberos
  • Demilitarized zone (DMZ)


  • In a CIFS environment, with only RODC, Kerberos communication is not working
    • secd: secd.unexpectedFailure:debug: vserver (<vserver>) Unexpected failure. Error: Lookup of CIFS account SID procedure failed
      Successfully connected to ip <rodc>, port 445 using TCP
      Improper format of Kerberos configuration file (KRB5_CONFIG_BADFORMAT)
      Failed to initiate Kerberos authentication. Trying NTLM.
      Encountered NT error (NT_STATUS_MORE_PROCESSING_REQUIRED) for SMB command SessionSetup
      Successfully authenticated with DC <rodc>
      Could not find Windows SID '<sid>'
      FAILURE: SID lookup failed 

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