Kerberos Errors in Event Log

Yes, I know there are TechNet and KB pages saying how to troubleshoot Kerberos issues. The relevant ones, however, are assuming that I know what service it at fault or even that the machine is correct. I see places saying to ignore them, but hunting through log files for real problems is made more difficult when "phantom" issues are clogging it up.

A Kerberos Error Message was received:
 on logon session 
 Client Time: 
 Server Time: 19:33:40.0000 9/2/2014 Z
 Error Code: 0x7  KDC_ERR_S_PRINCIPAL_UNKNOWN
 Extended Error: 
 Client Realm: 
 Client Name: 
 Server Realm: CO.KANE.IL.US
 Server Name: cifs/Itd023h.XXXX.XXXX
 Target Name: cifs/Itd023h.XXXX.XXXX@XXXX.XXXX
 Error Text: 
 File: 9
 Line: f09
 Error Data is in record data.

A Kerberos Error Message was received:
 on logon session 
 Client Time: 
 Server Time: 19:31:18.0000 9/2/2014 Z
 Error Code: 0x7  KDC_ERR_S_PRINCIPAL_UNKNOWN
 Extended Error: 
 Client Realm: 
 Client Name: 
 Server Realm: XXXX.XXXX
 Server Name: HTTP/GCITDEXCHCAS1.XXXX.XXXX
 Target Name: HTTP/GCITDEXCHCAS1.XXXX.XXXX@XXXX.XXXX
 Error Text: 
 File: 9
 Line: f09
 Error Data is in record data.

A Kerberos Error Message was received:
 on logon session 
 Client Time: 
 Server Time: 19:21:16.0000 9/2/2014 Z
 Error Code: 0x7  KDC_ERR_S_PRINCIPAL_UNKNOWN
 Extended Error: 
 Client Realm: 
 Client Name: 
 Server Realm: XXXX.XXXX
 Server Name: exchangeRFR/GCITDEXCHCAS1.XXXX.XXXX
 Target Name: exchangeRFR/GCITDEXCHCAS1.XXXX.XXXX@XXXX.XXXX
 Error Text: 
 File: 9
 Line: f09
 Error Data is in record data.

A Kerberos Error Message was received:
 on logon session 
 Client Time: 
 Server Time: 19:21:16.0000 9/2/2014 Z
 Error Code: 0x7  KDC_ERR_S_PRINCIPAL_UNKNOWN
 Extended Error: 
 Client Realm: 
 Client Name: 
 Server Realm: XXXX.XXXX
 Server Name: exchangeMDB/GCITDEXCHCAS1.XXXX.XXXX
 Target Name: exchangeMDB/GCITDEXCHCAS1.XXXX.XXXX@XXXX.XXXX
 Error Text: 
 File: 9
 Line: f09
 Error Data is in record data.

Okay, neither of those two machines are the machine with the log entries. The first machine doesn't even exist. The tools I did run were of somewhat limited help as I would assume that the error normally references the computer you're on.

There are other errors happening that do reference this computer. I'm investigating how to handle those, but I included them here in case they're related. Don't yell at me for not properly researching the below errors...  yet.  ;-)

A Kerberos Error Message was received:
 on logon session XXXX\ITDMCH
 Client Time: 
 Server Time: 19:32:26.0000 9/2/2014 Z
 Error Code: 0x19 KDC_ERR_PREAUTH_REQUIRED
 Extended Error: 
 Client Realm: 
 Client Name: 
 Server Realm: KANE
 Server Name: krbtgt/XXXX
 Target Name: krbtgt/XXXX@XXXX
 Error Text: 
 File: e
 Line: a05
 Error Data is in record data.

A Kerberos Error Message was received:
 on logon session 
 Client Time: 
 Server Time: 19:7:1.0000 9/2/2014 Z
 Error Code: 0xd KDC_ERR_BADOPTION
 Extended Error: 0xc00000bb KLIN(0)
 Client Realm: 
 Client Name: 
 Server Realm: XXXX.XXXX
 Server Name: itd539d$@XXXX.XXXX
 Target Name: itd539d$@XXXX.XXXX@XXXX.XXXX
 Error Text: 
 File: 9
 Line: f09
 Error Data is in record data.