So I ran into this error when I tried to demote a Domain Controller (2008 R2):
Active Directory Domain Services could not transfer the remaining data in directory partition
DC=DomainDnsZones, DC=Development, DC=Local to Active Directory Domain Controller \\DC2.production.local
"The directory service is missing mandatory configuration information, and is unable to determine the ownership of floating single-master operation roles."
So I take it that DC2 needs to be assigned the FSMO role using Ntdsutil.exe. I run that on my old DC1 2008 R2 server, connect to my new DC2 2012 server and assign it each role. Am I right about all of this?