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You can never have too many domain controllers but as a rule of thumb you need at least 2.
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You can never have too many domain controllers but as a rule of thumb you need at least 2.

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Check this<br />
<a href="http://technet.microsoft.com/en-us/library/cc728303(v=ws.10).aspx" rel="ugc">http://technet.microsoft.com/en-us/library/cc728303(v=ws.10).aspx</a>
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Check this
http://technet.microsoft.com/en-us/library/cc728303(v=ws.10).aspx [http://technet.microsoft.com/en-us/library/cc728303(v=ws.10).aspx]

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Just a few question<br />
How many domain server are needed for a typical network enviroment? <br />
How many is to many?<br />
If a domain server is demoted and made a members server, is there away to still have use of netlogon files?
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Just a few question
How many domain server are needed for a typical network enviroment? 
How many is to many?
If a domain server is demoted and made a members server, is there away to still have use of netlogon files?

Domain Servers need for enviroment and netlogon

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

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.