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Unable to authenticate after WinUpdate, Error 266 RRS feed

  • Question

  • Hello, 

    We setup a network connection for the company that will allow employees to login using their credentials from Active Directory. They were able to connect until I performed a Windows Update on Fall 2017. We've been having this issues for months. 

    I tried the methods on this KB: https://support.microsoft.com/en-us/help/933430/clients-cannot-make-connections-if-you-require-client-certificates-on - STILL UNSUCCESSFUL.

    I am running on WinServer 2012 R2

    Here's the log that shows on NPS...

     SubjectUserSid S-1-0-0 
      SubjectUserName *username*
      SubjectDomainName *COMPANY*
      FullyQualifiedSubjectUserName *COMPANY*\*username* 
      SubjectMachineSID S-1-0-0 
      SubjectMachineName - 
      FullyQualifiedSubjectMachineName - 
      MachineInventory - 
      CalledStationID 000000000000:WIFI-test 
      CallingStationID 40-98-AD-1E-ED-81 
      NASIPv4Address 0000000
      NASIPv6Address - 
      NASIdentifier 000000
      NASPortType Wireless - IEEE 802.11 
      NASPort 99 
      ClientName CCI-ZD 
      ClientIPAddress 000000000
      ProxyPolicyName ZD Connectioin 
      NetworkPolicyName - 
      AuthenticationProvider Windows 
      AuthenticationServer *SERVER NAME*
      AuthenticationType PEAP 
      EAPType - 
      AccountSessionIdentifier - 
      ReasonCode 266 
      Reason The message received was unexpected or badly formatted. 
      LoggingResult Accounting information was written to the local log file. 

    Any suggestions? Thank you in advanced. 


    • Edited by kinn93 Friday, January 26, 2018 4:20 PM
    Thursday, January 25, 2018 11:03 PM

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