How to install second domain controller?

There is a domain controller (windows 2003 in mixed mode). I like to install second domain controller in the network. Can someone kindly list the detailed steps to install it and run it as a secondary domain controller?

Thanks a lot.
richtreeAsked:
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dnudelmanConnect With a Mentor Commented:
install windows server on the machine.
configure network connection to be in the same network and the main domain controller IP adress as your primary DNS and follow the steps:

run
dcpromo
follow the wizard. choose this server to be a additional domian controller.

That's that easy
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richtreeAuthor Commented:
Do I need to worry about anything else besides following through the wizard? Such as FSMO, etc?
Any things that I should be aware of to avoid screwing up the existing AD?
Thanks.
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drchristopheConnect With a Mentor Commented:
Hi,

No need to worry about breaking current AD enviroment. Additional DC will replicate OU's, GPO's etc using File Replication System (FRS). Once you have promoted the second 2K3 server to a DC it will proceed to replicate data from the original DC within 5 mins.

As far as FSMO roles go I wouldn't worry about them too much as you can always seize them if orginal DC fails. Also depends on the number of users you have. For example if you have 1000 users in one office and 50 in the other you want to put the PDC role closest to the largest number of users to help with password changes, group policy updates etc... If you have a single forest, which I presume you have the is no need to split roles up.

Remeber to let the wizard install DNS for you. This means you will have two DNS servers in your network. Don't forget if you choose to install DNS on the second server to change the primary DNS server on the IP settings on the Network Card to look at itself and the secondary DNS server setting should be set to look at the first DC. This is MS best practice.

Hope this helps.
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Lee W, MVPConnect With a Mentor Technology and Business Process AdvisorCommented:
Not really saying anything different - just more...

Make the second DC a global Catalog.
http://support.microsoft.com/kb/313994

If the machine you want to promote is an Exchange Server, DO NOT DO IT.  Promoting OR demoting a machine running Exchange 2003 will break exchange.  You can install exchange on either (strongly recommended you do not install it on a DC, but it is technically supported), just make sure once Exchange is installed, you don't promote or demote it to/from DC.

Unless your General Motors or some HUGE company like that (in which case, you have many sys admins who most likely already know this), you don't need more than 2 DCs per site.  
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richtreeAuthor Commented:
Thank you so much for your wonderful tips.
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Feroz AhmedSenior Network EngineerCommented:
Hi,
You can install Secondary domain controller which is called as Child Domain controller ,and the procedure is same as how you install a domain controller ,the steps are ,goto start--run--type (Dcpromo) and select child domain controller instead of Domain Controller and the steps are the same this will install child domain controller.
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CMANI10Commented:
HI, I need to shutdown DC and child domain controller need to change to DC. If need to do this what i need to do?
 
kind regards,
K.Mansurali.
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