2003 native mode to 2008?

i running in 2003 native mode 10 domain controllers.  want add 2008 r2 domain controller.  there such thing 2008 mixed mode?  if so, of 2008 functionality 1 2008 r2 server or of domain controllers need @ 2008 r2?  thanks

hi,

you can install windows server 2008 r2 in windows server 2003 native mode. since have many windows server 2003 domain controllers, domain , forest functional level cannot upgrade windows server 2008 r2.

for new features windows server 2008 r2 domain , forest functional level provide, please refer following microsoft technet article:

understanding active directory domain services (ad ds) functional levels
http://technet.microsoft.com/en-us/library/understanding-active-directory-functional-levels(v=ws.10).aspx

to upgrade or install windows server 2008 r2 in windows server 2003 environment, need run adprep.exe. more information, please refer following microsoft technet article:

upgrade domain controllers: microsoft support quick start adding windows server 2008 or windows server 2008 r2 domain controllers existing domains
http://technet.microsoft.com/en-us/library/upgrade-domain-controllers-to-windows-server-2008-r2(v=ws.10).aspx.

regards,

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arthur li

technet community support

Windows Server  >  Directory Services