Event ID: 537 Windows 2000

Hi,
Hopefully someone might be able to help. I keep getting the following Audit failure on one of our Exchange boxes:

Event Type:      Failure Audit
Event Source:      Security
Event Category:      Logon/Logoff
Event ID:      537
Date:            29/03/2012
Time:            10:08:01
User:            NT AUTHORITY\SYSTEM
Computer:      SERVERNAME
Description:
Logon Failure:
       Reason:            An unexpected error occurred during logon
       User Name:      
       Domain:            
       Logon Type:      3
       Logon Process:
       Authentication Package:      NTLM
       Workstation Name:
      
This audit failure fills up the log in about a minute, which is weird to say the least.
The server is quite old, (Windows 2000 SP4 with all critical and important patches), and is one of our exchange servers and I’d a bit loathed to reboot it as it will cause a lot of paperwork.

I was wondering if anyone had come across this issue before.

I’ve had a look around on the web for similar issues, but I haven’t found one that fits the bill precisely. There are a lot of 537 events depicting Kerberos errors, but as you can see the logon process is blank. Also a few people have suggested that it might be a DC time issue, but all out DCs have the correct time and replication is A-OK.

Using Process Explorer, (by sysinternals) I think it’s the LSASS.exe process that’s the cause as it’s chewing up a load of CPU time. I’m not sure though as I can’t trace it back to the Audit failure, as you can see the logs aren’t detailed enough. I don’t want to kill it as I know it’ll probably hang the server.

Any information on how to retrieve further details on how to obtain more information about logon failures would be most grateful.

Thanks.

AD functional level 2003
DCs:             4 Win 2003 servers and 1 Win 2008 R2 server
Exchange:       3 Win 2003 servers and 1 win 2000 (SP4) server.
fossorAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

fossorAuthor Commented:
FIXED

Found that the IIS Service had errors on it. It couldn't see to see it's "backofficestore" in so of its objects. Stopped and restarted the IIS. The IIS objects reconnected and the Security Audit Failures stopped. All looking OK now.

Should have looked at the OWA a little sooner to be hoest... :-/
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Exchange

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.