title: Kerberos authentication ticket - Event ID 4768 - Audit failure
body: <p>I am using kerberos to authenticate a user and its failing. Audit failure details in event viewer are following</p>
  
  <pre><code>A Kerberos authentication ticket (TGT) was requested.
  
  Account Information:
      Account Name:        ax
      Supplied Realm Name:    TEST.COM
      User ID:            NULL SID
  
  Service Information:
      Service Name:        krbtgt/TEST.COM
      Service ID:        NULL SID
  
  Network Information:
      Client Address:        ::ffff:2.2.2.60
      Client Port:        38532
  
  Additional Information:
      Ticket Options:        0x40800000
      Result Code:        0x6
      Ticket Encryption Type:    0xffffffff
      Pre-Authentication Type:    -
  
  Certificate Information:
      Certificate Issuer Name:        
      Certificate Serial Number:    
      Certificate Thumbprint:        
  
  Certificate information is only provided if a certificate was used for pre-authentication.
  
  Pre-authentication types, ticket options, encryption types and result codes are defined in RFC 4120.
  </code></pre>
  
  <p>The result code 0x6 means that user doesn't exist in Kerberos database but i have a user already configured in AD.
          This is windows server 2008 (non-R2) and user account name is "axtest" and User logon name is "ax/mytest". The domain name is test.com. From wireshark, i can see that my client is sending AS-REQ which has correct 2 name string items ax &amp; mytest. I am not sure why is it failing.  </p>
  
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