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User accounts locked after DC rebooted.

Our office 2008 domain has 2 domain controllers on it. I needed to reboot one of them and since then users are reporting that their accounts are locked. Sure enough, in AD the option 'Unlock Account' is active but if I select it and ht Apply nothing happens.

Any idea why this has happened i.e. is there something wrong with my AD setup?

Thanks
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funasset
Asked:
funasset
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1 Solution
 
NikSystems SpecialistCommented:
When you clicked on the box and clicked apply, user was unlocked even though nothing happened.
If you close the object properties and open it again, you will see that the user is not locked anymore.

Why those users were locked out, I really can't tell. Any info in the event viewer?
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funassetAuthor Commented:
That didn't appear to be the case I'm afraid.  The domain controller I rebooted just has a couple of entries in the App log stating -

The winlogon notification subscriber <GPClient> took XX seconds to handle the notification event (CreateSession).

How can rebooting a server cause all accounts to lockout??
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NikSystems SpecialistCommented:
I have never heard about this issue before. I will try to investigate more...
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funassetAuthor Commented:
I'm not sure what actually cleared the problem as it was a bit of a panic job! I restarted both my DCs which included a reboot of the DNS services, flushed DNS caches all over the place and all of a sudden it just decided to play nicely. Thanks Windows.
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funassetAuthor Commented:
See previous update.
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