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Do AD machine accounts expire?

Posted on 2010-09-07
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Last Modified: 2012-05-10
We have a machine that is set to autologin to a network account.  It runs some equipment on our production line.  Users login to the software many times every day, but they never reboot or shutdown this machine.  It stays logged in and powered on 24/7/365.  About every 90 days, the machine loses all connection to AD and file shares. Of course this only happens during 3rd shift, when we have no one from IT in the building. The only way we can get it working again is to login as a local admin, remove it from the domain, and readd it to the domain.  Then it works for another 90 days.

Is there a way to prevent this from happening?  Will a simple reboot every 30 days alleviate this issue?

Thanks
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Question by:hundet
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by:bhzdkh
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snusgubben earned 500 total points
ID: 33621846
Machine accounts passwords don't expire from the AD side of view.

When the machine account's password is 30 days old the machine ifself will initiate a password change. The DC's never initiate the change.

If ie. a machine has been offline for 60 days and is brought back online it will change the password. No need to rejoin the domain.

Have you looked in the computers event log if something is logged when this happens?
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by:dasaybz
ID: 33628062
Sounds to me like there is a service that is stopping.
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Author Comment

by:hundet
ID: 33628190
I'm trying to get access to that machine to check eventlog.  It runs a piece of manufacturing equipment 24/7 so I'm having problems getting access.  Remote tools are shutdown by firewalls so that won't work either.

I'll post results as soon as I can get to it.
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by:dasaybz
ID: 33628395
You can get to the event log by managing the the PC through Active Directory. Just right click on the computer account and go to manage.
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Author Closing Comment

by:hundet
ID: 33744714
No time to fully investigate this.  Production Line is too busy.  I'll deal with it in another 60 days.
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