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Yes, all workstations and Servers have Static IP and DNS settings. &nbsp;<br />
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Do you know of any documentation that states the proper way to do this. &nbsp;What you said in you first paragraph makes sense, but my boss believes all you have to do is give the windows 2008 DC a secondary IP address of the 2003 servers we are decommissioning. &nbsp;I know this will not work, but I'm trying to find proof. &nbsp;Any assistance would be greatly appreciated. &nbsp;Thanks.
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Here is one about changing the static IP of a DNS server<br />
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<a href="http://technet.microsoft.com/en-us/library/cc758579(WS.10).aspx" rel="ugc">http://technet.microsoft.com/en-us/library/cc758579(WS.10).aspx</a><br />
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Thanks<br />
<br />
Mike
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Thanks mkline71. &nbsp;Is this the process you normally go through when you are migrating to new domain controllers?
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We usually update the clients but reusing will work too and shouldn't be bad in a smaller network like this one.<br />
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Thanks<br />
<br />
Mike
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I have two windows 2003 domain controllers that I am decommissioning. &nbsp;Last week I brought up two 2008 R2 domain controllers and transferred all the FSMO roles. &nbsp;Right now the DNS settings on all workstations and Servers on the network is pointed to the 2003 Domain Controllers that I am going to decommission. &nbsp;So of course when I shut down the 2003 DC's things are not going to work properly because everyones DNS is still pointed to these Servers. &nbsp;Is it possible to give my Windows 2008 Servers a secondary IP address of the 2003 DC's that I am shutting down? &nbsp;This way everyone won't have to change DNS Settings. &nbsp;Thanks.
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I have two windows 2003 domain controllers that I am decommissioning.  Last week I brought up two 2008 R2 domain controllers and transferred all the FSMO roles.  Right now the DNS settings on all workstations and Servers on the network is pointed to the 2003 Domain Controllers that I am going to decommission.  So of course when I shut down the 2003 DC's things are not going to work properly because everyones DNS is still pointed to these Servers.  Is it possible to give my Windows 2008 Servers a secondary IP address of the 2003 DC's that I am shutting down?  This way everyone won't have to change DNS Settings.  Thanks.

Decommissioning 2003 Domain Controllers and bringing up 2008 Domain Controllers

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

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

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.