Active Directory (AD) is an implementation of LDAP directory services by Microsoft for use primarily in Windows environments. Its main purpose is to provide central authentication and authorization services for Windows-based computers. Active Directory also allows administrators to assign policies, deploy software, and apply critical updates to an organization. Active Directory stores information and settings in a central database. Active Directory networks can vary from a small installation with a few hundred objects, to a large installation with millions of objects.
Active Directory was previewed in 1996, released first with Windows 2000 Server edition, and revised to extend functionality and improve administration in Windows Server 2003. Additional improvements were made in both Windows Server 2003 R2 and Windows Server 2008.
Installing Active Directory (Primary Domain Controller) and Primary DNS
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Click "Start Menu" and choose "Run" and enter "dcpromo"
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Click "Next"
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Select "Domain Controller for a new domain" and click "Next"
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Select "Create a new domain tree" and click "Next"
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Select "Create a forest of domain trees"
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Enter full DNS name for new domain (E.g. nanflexaltech.com) and click "Next"
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Dont change the Domain Netbios Name, just leave it and click "Next"
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here, you can change directory to store "active directory database and Log and click "Next"
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you can specify other folder for your sysvol folder and click "Next"
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just ignore the DNS Error and click "Ok"
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Select "yes, Install and configure DNS or this computer and click "Next"
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Select "permission compatible only with Windows 2000 server and click "Next"
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Enter "Directory services restore mode administrator password" and click "Next"
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click "Next" and you will see the picture below
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click "Finish"
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click "Restart now"
Congratulation, your Active Directory has been installed on your system, please restart your Windows 2000 Server.