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Hi,<br />
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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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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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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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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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I've been adding a few new computers onto my domain &amp;&nbsp;when I do I will remove the old computer from teh domain &amp;&nbsp;set the IP to DHCP. I have a Windows 2008 Domain with Windows Vista &amp;&nbsp;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 &amp;&nbsp;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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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

Old Computer Accounts in Active Directory

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.

Active Directory

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.