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Gad SAADIAFlag for France

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DC 2012 and DC 2008

Present configuration: Single domain, 2 DCs (Windows 2008 SP2 32bits, Windows 2008 R2 64bits)

I need to promote a new Windows 2012 R2 server as an additional DC
It will eventually be the primary DC and all FSMO roles will migrate to the Windows 2012 R2 server

Question:
Is the procedure to promote the Windows 2012 R2 server the same as promoting a Windows 2008 R2 ?
- ADPREP /forestprep (on any 2008 DC)
- ADPREP /domainprep (on any 2008 DC)
- DCPROMO on the 2012 server
- Transfert 5 FSMO roles to Windows 2012

Or is it a new procedure?
Or something new to do ?
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Seth Simmons
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Hi ...

For promoting from 2008 to 2012, you should promote you domain functional levels to 2012 mixed mode first..

what i can suggest you to add 2012 as member server first and check the replication by transferring any one of the fsmo roles.

if you noticed, it is working as expected. then you can migrate the all fsmo roles. without any issue.

i follow this option to migration..

increasing domain and forest levels --> adding the 2012 server as member server --> transfer the fsmo roles --> remove the old server by metadata clean up..  

i m suggestion you to follow the microsoft tech articles for more clear visibility..

Just for your idea..
http://chasestice.wordpress.com/2013/06/03/active-directory-creating-a-domain-with-windows-2012-and-2008-r2-servers/
For promoting from 2008 to 2012, you should promote you domain functional levels to 2012 mixed mode first..

1) you can't raise the functional level to 2012 if there is no 2012 domain controller in place
2) there is no longer mixed mode functional levels; not since windows 2000

adding the 2012 server as member server --> transfer the fsmo roles

server needs to be a domain controller to transfer FSMO roles; not a member server

remove the old server by metadata clean up

not necessary when the server is still functioning properly
1) you can't raise the functional level to 2012 if there is no 2012 domain controller in place

To clarify further, you can't raise the functional level to 2012 if there are any Domain Controllers that *aren't* server 2012 or higher.
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thanks