Promote Server 2008 r2 to primary DC

In my current environment I have 2 Domain controllers the primary is server 2003 and the secondary is server 2008 r2 I would like to promote 2008 to primary and keep 2003 as the secondary. Any ideas or suggestions on how this is accomplished?
lhustonAsked:
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Krzysztof PytkoConnect With a Mentor Senior Active Directory EngineerCommented:
There is no Primary/Secondary these days :) all of them work in multi-master replication topology and have R/W AD database. The only one thing whihc diffrentiates them is that one of them holds FSMO roles. You can simply transfer them to 2008 R2. If you wish you may follow an article on my blog for that at
http://kpytko.wordpress.com/2011/08/26/transferring-fsmo-roles-from-gui/
http://kpytko.wordpress.com/2011/08/26/transferring-fsmo-roles-from-command-line/

when you transfer PDC Emulator role, you need to advertise new time server in your forest

[...]- after transfer of the PDCEmulator role, configure the NEW PDCEmulator to an external timesource and reconfigure the old PDCEmulator to use the domainhierarchie now. Therefore run on the NEW "w32tm /config /manualpeerlist:PEERS /syncfromflags:manual /reliable:yes /update" where PEERS will be filled with the ip address or server(time.windows.com) and on the OLD one run "w32tm /config /syncfromflags:domhier /reliable:no /update" and stop/start the time service on the old one. All commands run in an elevated command prompt without the quotes. [...]

it's an extract from MVP blog at
http://msmvps.com/blogs/mweber/archive/2010/02/10/upgrading-an-active-directory-domain-from-windows-server-2003-to-windows-server-2008-or-windows-server-2008-r2.aspx

DNS configuration doesn't change as long as you will use 2003 DC in your network. Remember to have at least 2 DCs with DNS servers in domain for redundancy and do regularly System State backup of each of them

Regards,
Krzysztof
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lhustonAuthor Commented:
Thank You. Very informative.
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lhustonAuthor Commented:
I followed these steps one by one for the GUI instructions. Everything went through with no issues. Thanks again for the help.
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Krzysztof PytkoSenior Active Directory EngineerCommented:
You're welcome :)

Krzysztof
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