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GP Account Lockout, strange behaviour

Posted on 2014-02-06
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Last Modified: 2014-03-08
Hi all
I've enabled, on my domain (win srv 2008), the Account Lockout Policy.
I have a problem with only 1 user (in total they are 80, more or less).
He finds randomly his account locked, but he does not use a wrong password (at least, not 10 times as GP!). It happens 2-3 times every month.

In event viewer I cannot find anything regarding these locks

He uses:
- pc with Windows 7
- mac with parallels for a Windows 7 machine
- iPad
- iPhone

Any ideas?
Thx
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Question by:ServiceAdvisory
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9 Comments
 
LVL 14

Expert Comment

by:Alex Green
ID: 39838501
Go here

http://www.microsoft.com/en-gb/download/details.aspx?id=18465

Download the lockout tools, it will scan your domain controllers and you should be able to find where the account is locking out. Go to said computer and you'll probably find something like a scheduled task or the account logged on with an old password.
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Author Comment

by:ServiceAdvisory
ID: 39838528
nice tool, but from there I can see on which DC is locked (when he is): or I am using it in the wrong way?

I read that I should look for an event id 4740, but I cannot find it anywhere.
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LVL 14

Expert Comment

by:Alex Green
ID: 39838532
If you open eventcombMT and then at the top click searches, built in searches, account lock outs :D
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Author Comment

by:ServiceAdvisory
ID: 39838546
ok, good
but no results here

Total events searched: 540396
Total matches found: 0
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LVL 14

Expert Comment

by:Alex Green
ID: 39838558
:-(

Not sure then, it could be that he's actually just locking out his account by accident and doesn't want to admit it... :S

The other thing I would check is your current Security log size, if it's not large enough it'll only keep data for the day rather than historical data, you may need to change that so you have the logs to scan in the first place.

Regards

Alex
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LVL 22

Expert Comment

by:Joseph Moody
ID: 39838667
What is your account lockout threshold? Microsoft suggests keeping it at 10.
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Author Comment

by:ServiceAdvisory
ID: 39846620
Yes, the value is 10
Any other idea?
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Accepted Solution

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ServiceAdvisory earned 0 total points
ID: 39876333
no solution atm
any idea, or I can close?
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Author Closing Comment

by:ServiceAdvisory
ID: 39914417
no solution provided
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