Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Active Directory block accounts of some of my users

Posted on 2009-07-16
4
Medium Priority
?
841 Views
Last Modified: 2012-05-07
Hi
We have a Windows 2003 Server with AD running in two servers with Microsoft Exchange Server in one of them. After about one month all our accounts come blocked every morning and severall times by day by the Active Directory himself.
We have all the licencensing process ok and service "License Logging Server" running ok.
Why this happens ? How to solve the situation ?
Can you help please ?
Thank you very mutch Raul
0
Comment
Question by:raulcord
[X]
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
4 Comments
 
LVL 26

Expert Comment

by:MidnightOne
ID: 24873095
What do you mean by all accounts become blocked? Users are unable to log in? What error message, if any, do they get?
0
 
LVL 1

Expert Comment

by:admin_lbpsb
ID: 24873375
Sounds like a virus to me. Have a look at Event Viewer, Security for Event ID 644 (locked out accounts) on both AD servers. The event will list the computer trying to log in.
0
 
LVL 4

Accepted Solution

by:
DarrenJL earned 2000 total points
ID: 24877745
It does sound a lot like the Conficker worm (http://support.microsoft.com/kb/962007) but it could also be something else.

We use a proxy server to protect our users from the web and occasionally this locks certain users out. One user (Web development) uses Safari as one of their web browsers and that tries multiple times to connect to the web through the proxy server, after the 10th attempt it locks the users account and requires a member of IT to unlock it again.

Our Proxy server is connected via LDAP to our AD infrastructure.

Darren
0
 

Author Comment

by:raulcord
ID: 25351455
Thank you very mutch
0

Featured Post

Are your AD admin tools letting you down?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

Question has a verified solution.

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

Microsoft Office 365 is a subscriptions based service which includes services like Exchange Online and Skype for business Online. These services integrate with Microsoft's online version of Active Directory called Azure Active Directory.
How to deal with a specific error when using the Enable-RemoteMailbox cmdlet to create a mailbox in the cloud-based service, for an existing user in an on-premises Active Directory.
This tutorial will walk an individual through the process of transferring the five major, necessary Active Directory Roles, commonly referred to as the FSMO roles from a Windows Server 2008 domain controller to a Windows Server 2012 domain controlle…
This video shows how to use Hyena, from SystemTools Software, to update 100 user accounts from an external text file. View in 1080p for best video quality.
Suggested Courses

705 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