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Old Computer Accounts in Active Directory

I've been adding a few new computers onto my domain & when I do I will remove the old computer from teh domain & set the IP to DHCP. I have a Windows 2008 Domain with Windows Vista & Windoes 7 clients. My question is, how long does it take for the computer account to be automatically removed from active diretcory? At this time, the ones that have left the domain have a arrow pointing down next to them. I have one old computer account that I removed about a month ago & it is still there....Is AD malfunctioning? I also have the old DNS records in the DNS forward zone...I thought they were supposed to be automatically removed as well with the computer accounts...am I wrong? Please advise...thanks
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wantabe2
Asked:
wantabe2
1 Solution
 
Mike KlineCommented:
Did you actually go in and delete the computer account and it is still there?   Verify that replication is happening.

Generally when an account is deleted it goes into a "Tombstone State"  but you shouldn't see it in ADUC.  After the tombstone lifetime period has passed it will be deleted more on that subject here   http://technet.microsoft.com/en-us/magazine/2007.09.tombstones.aspx

By default computer accounts don't get deleted on there own.  That is where free cleanup tools like oldcmp   http://www.joeware.net/freetools/tools/oldcmp/ or ad tidy http://www.cjwdev.co.uk/Software/ADTidy/Info.html can help

DNS records will be removed if you have scavenging enabled.

Thanks

Mike
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khairilCommented:
Hi,

When you disjoin a workstation from the domain, it won’t automatically delete the computer account from the Domain. You need to manually delete it.
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Stelian StanCommented:
Yes, you have to manually remove AD object (computer). After removing a computer from the domain you will see a red X on that computer in ADUC.
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