Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Security System detected an attempted downgrade attack - Account keeps getting locked out

Posted on 2006-07-11
3
9,849 Views
Last Modified: 2013-12-04
This user keeps getting locked out and I do not understand why. She has a black berry too. It gets locked out every couple of mins or so.


????


the event viewers are below. XP Pro w. xp2 and outlook 2003. exchage 2003
Event Type:      Warning
Event Source:      LSASRV
Event Category:      SPNEGO (Negotiator)
Event ID:      40960
Date:            7/11/2006
Time:            9:06:15 AM
User:            N/A
Computer:      ACM-XP003
Description:
The Security System detected an attempted downgrade attack for server exchangeMDB/mail.xxx.com.  The failure code from authentication protocol Kerberos was "The user account has been automatically locked because too many invalid logon attempts or password change attempts have been requested.
 (0xc0000234)".

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

----------------------------------------------------------------------------------------------------------------------------==
Event Type:      Warning
Event Source:      LSASRV
Event Category:      SPNEGO (Negotiator)
Event ID:      40961
Date:            7/11/2006
Time:            9:06:15 AM
User:            N/A
Computer:      ACM-XP003
Description:
The Security System could not establish a secured connection with the server exchangeMDB/mail.xxx.com.  No authentication protocol was available.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
0
Comment
Question by:ctechsol
3 Comments
 

Author Comment

by:ctechsol
ID: 17081733
user was logged on to two different computers at the same time. it happens after a user has changed the password but has not logged off from previous computers using the old password.
0
 
LVL 5

Accepted Solution

by:
Netminder earned 0 total points
ID: 17118360
Closed, 500 points refunded.
Netminder
Site Admin
0

Featured Post

Migrating Your Company's PCs

To keep pace with competitors, businesses must keep employees productive, and that means providing them with the latest technology. This document provides the tips and tricks you need to help you migrate an outdated PC fleet to new desktops, laptops, and tablets.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Recently, I read that Microsoft has analysed statistics for their security intelligence report. It revealed: still, the clear majority of windows users do their daily work as administrator. An administrative account is a burden, security-wise. My ar…
OfficeMate Freezes on login or does not load after login credentials are input.
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

860 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question