Here are the high level steps which you can use to upgrade the Active Directory.
You can ignore the following message. However, if you are planning to install RODC later, you need perform ADPREP/RODCPREP
first. First Windows 2008 DC cannot be a Read Only Domain Controller (RODC).
5. If you are planning to decommission the old servers, you need transfer FSMO roles, DHCP etc to the new server.
Note - You can identify the FSMO role DC information using
Netdom /Query FSMO command.
Reference FSMO -
6. You can remove (demote) a domain controller using DCPROMO command and again, since WS2012 also possible with Powershell.
Reference Powershell -
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Good and simple Artical
Good and simple Article
Thanks for the Feedback!
Thanks Biswajit :)
Patris_70, That is not true. Read the article carefully. blogs.technet.com/.../friday-mail-sack-i-live-again-edition.aspx
“Isolating the Schema Master for ADPREP /FORESTPREP is not tested by the Product Group and not recommended”
I am removing that comment from this Wiki Article.
First, thanks for your simle and good article.
Here is german Active Directory Team article (use Bing Translator):
So kann beim Schema Upgrade für Windows 2008 (fast) nichts schiefgehen(english: So (almost) nothing can go wrong during the schema upgrade for Windows 2008)
Isolating the Schema Master for ADPREP /FORESTPREP is NOT recommended by Microsoft.
Thanks Fabrizio for converting this document into Italian.
Thanks Fabrizio Volpe and Yagmoth555 and for translating this article into Italian and French
Italian Version -
French Version -