[ActiveDir] User accounts getting locked out..

[Sudhir Kaushal]

Hi All,

I am facing one strange issue. All of sudden my user accounts are getting locked out in certain OU's. The event logs says

Event Id - 675, AUDIT FAILURE, Security, Mon Nov 14 12:50:57 2005, NT AUTHORITY\SYSTEM, Pre-authentication failed:   User Name: xyz    User ID:  %{xyz}     Service Name: krbtgt/domain name     Pre-Authentication Type: 0x2     Failure Code: 0x18     Client Address: IP address.
   
Event Id - 644, AUDIT SUCCESS, Security, Mon Nov 14 12:50:56 2005, NT AUTHORITY\SYSTEM, User Account Locked Out:     Target Account Name: xyz     Target Account ID: %{xyz}     Caller Machine Name: Name of the machine     Caller User Name: Name of the DC    Caller Domain: Domain Name     Caller Logon ID: (0x0,0x3E7)    

They also get clear after some time automatically.  One reason which i figure out is that it could be related to the system time of the client machine with the system time of DC ( Related to failure of Kerberos ticket ) .  Any other pointers???  

Thanks in Advance.

Regards,
Sudhir Kaushal
Systems Engineer (GIS)
Computer Sciences Corporation.
India - + 91 120 2582323 Ext. 2649
Denmark - + 45 70100024 Ext. 2649
 
“You never win Silver, You lose Gold”


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