Symptoms

I am seeing a lot of errors in the system event logs similar to this:

A Kerberos Error Message was received:

on logon session DENALLIXK2Service
Client Time:
Server Time: 19:9:17.0000 9/15/2015 Z
Error Code: 0x19 KDC_ERR_PREAUTH_REQUIRED
Extended Error:
Client Realm:
Client Name:
Server Realm: AMERICAS
Server Name: krbtgt/DENALLIX
Target Name: krbtgt/DENALLIX@DENALLIX
Error Text:
File: e
Line: a05
Error Data is in record data.
 

Diagnoses

Usually, this Kerberos error can be ignored it is likely being logged because Kerberos logging had been enabled (usually Kerberos logging is disabled by default and will only need to be enabled when troubleshooting Kerberos issues).

http://answers.microsoft.com/en-us/windows/forum/windows_7-security/error-code-0x19-kdcerrpreauthrequired/ed5fc1db-6a44-4b16-b6b6-5f55e07c9ca4?auth=1
 

Resolution

If you are not experiencing any issues/troubleshooting Kerberos, this can be disabled via setting the 'LogLevel' key = 0 or removing this 'LogLevel' key as per:

https://support.microsoft.com/en-us/kb/262177