Event ID 529 on SBS

I have a SBS2003 and Standard Server 2003 (Terminal Server) environment. Evnet log shows over 3500 occurances of event ID 529, with the following detail -

Reason:      Unknown user name or bad password
User Name:      admin
Domain:      SSR
Logon Type:      8
Logon Process:      IIS
Authentication Package:      MICROSOFT_AUTHENTICATION_PACKAGE_V1_0
Workstation Name:      SSR-SVR1
Caller User Name:      SSR-SVR1$
Caller Domain:      SSR
Caller Logon ID:      (0x0,0x3E7)
Caller Process ID:      1764
Transited Services:      -
Source Network Address:      -
Source Port:      -

NB. SSR-SVR1 is the SBS. I have no non-standard IIS processes running, although I have configured an FTP site locally.

I generally find the myriad of things event 529 refers to confusing - can someone help explain how IIS can be attempting authentication this many times?

Thanks.
qtgAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
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.

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
qtgAuthor Commented:
Issue has not reocurred, but I have heeded the posts above (Administrator account does not lock after unsuccessful attempts). Thanks.
0
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
Web Browsers

From novice to tech pro — start learning today.