Migration SBS 2003 to Server 2012 R2

I've done several SBS 2003 to 2012 R2 Essentials migration but now migration to 2012 R2 Standard, not Essentials. The document I use, http://blogs.technet.com/b/sbs/archive/2014/02/21/deploying-windows-server-2012-r2-essentials-in-an-existing-active-directory-environment.aspx
says it works for this migration as well but then says for 2012 R2 Standard to refer to  http://blogs.technet.com/b/sbs/archive/2014/02/17/deploying-windows-server-2012-r2-standard-datacenter-with-windows-server-essentials-experience-role-in-an-existing-active-directory-environment.aspx
which says to join the 2012 server to the existing 2003 domain and then install the Essentials role. Is this correct? it seems like if I add it to the domain as a member server I won't be able to install AD. I think I need to install the Essentials role and then begin the migration and not join it to the 2003 domain.
Thanks
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dpachecoAsked:
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Cliff GaliherCommented:
You can install AD after making it a ember server just fine. So the guidance us accurate.
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dpachecoAuthor Commented:
Thanks!
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