Windows 2003 Pre-authentication failed

Hi
I have a domain controller that has ALOT (read 4 times / minute) of "Failure Audit" entries in the Security log.

The entries are of ID 675, Category Account Logon. The message is

"Pre-authentication failed:"
Failure Code: 0x19


If I demote the server to just be a member server it is fine. But if i repromote the server the errors return.



Regards




Andrew Teece
Technical Architect

.

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