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AD Account locked out daily once

Posted on 2009-05-05
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Last Modified: 2012-05-06
Hi.. i have a problem in my AD account. it gets locked out automatically daily once. i am sure i am not entering any wrong password. i am in Server 2003 active directory. anybody have any solutions will be highly appreciated.

Thanks.
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Question by:pshaduli
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by:KCTS
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Check that you do not have a scheduled task and/or service set to run using the account and an old password.
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by:Americom
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Was there a password changed lately? If so, then you must have some scheduled task using this old password, or you could have terminal session or logged session on multiple machines still active. You can check your secuirty event logo on your DCs to find out which machine(s) the account was locked from.
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by:bluntTony
bluntTony earned 50 total points
ID: 24304346
You may also want to clear out any cached credentials on the workstation you are logging on to.
Control Panel | User Accounts | Advanced | Manage Passwords - clear out any entries in here.
Like Americom says, check the event logs on your DC(s) for failed logon attempts. As well as the source machine, check the logon type on the event. This will give you an idea of the source : http://www.windowsecurity.com/articles/Logon-Types.html
For example, a logon type 3 will most likely refer to a bad attempt the connect to a shared folder on the network.
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FADVMSAdmin earned 100 total points
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This typically happens in my company when an administrator RDPs into a server for whatever reason and then simply disconnects without logging off. Then when that admin has a scheduled password change, the old RDP session continues to use the old password causing lockouts such as this.

If you have access to the DCs of your network, I suggest using the Microsoft Account Lockout tools, especially the EventcombMT.exe to scour your DC's security log to find out where the lockout is coming from (i.e. your machine, some other server, etc). That should lead you to an answer. That is of course if your AD environment is auditing those kinds of events.

MS Account Lockout tools can be found here:
http://www.microsoft.com/downloads/details.aspx?familyid=7AF2E69C-91F3-4E63-8629-B999ADDE0B9E&displaylang=en

Some useful info:
http://technet.microsoft.com/en-us/library/cc738772.aspx
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