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Did you create a Delegation for the Child Domain on the Parent (Root) DNS Server?<br />
How are the DNS settings on the NIC settings of the clients configured? (Search suffixes)
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Did you create a Delegation for the Child Domain on the Parent (Root) DNS Server?
How are the DNS settings on the NIC settings of the clients configured? (Search suffixes)

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Found the source of the problem and figured out a work around.
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Found the source of the problem and figured out a work around.

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<div class="content wysiwyg-content">
Good day experts,<br />
<br />
I have a subdomain (a.abc.com) where my primary AD domain is abc.com. &nbsp;I have DHCP setup to provide addresses and both the forward and reverse zones setup in DNS.<br />
<br />
The Windows7 or RedHat linux client receives an address from the proper IP scope, however it will not register with DNS. &nbsp;<br />
<br />
The Windows DNS server is set to allow Secure and Non Secure updates (we are on a closed network). &nbsp;<br />
<br />
The DHCP server scope is set to Enable DNS dynamic updates.<br />
<br />
The primary domain (abc.com) DNS registration from DHCP seems to work just fine.<br />
<br />
Ideas?
</div>
</div>


Good day experts,

I have a subdomain (a.abc.com) where my primary AD domain is abc.com.  I have DHCP setup to provide addresses and both the forward and reverse zones setup in DNS.

The Windows7 or RedHat linux client receives an address from the proper IP scope, however it will not register with DNS.  

The Windows DNS server is set to allow Secure and Non Secure updates (we are on a closed network).  

The DHCP server scope is set to Enable DNS dynamic updates.

The primary domain (abc.com) DNS registration from DHCP seems to work just fine.

Ideas?

MS Active Directory, Linux, DHCP, and DNS

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.

Windows Server 2008

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.

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.