This article will show you how to seize FSMO roles on Windows Server 2012 R2.
Just as a reminder Windows Sever Active Directory contain 5 roles:
Schema master
Domain naming master
Relative ID (RID) master
PDC emulator
Infrastructure master
To seize the FSMO roles start the cmd line tool:
Type:
ntdsutil
Roles
Connections
Connect to server SERVERNAME.DOMAIN
Next type one or all the lines below to seize the role or roles needed to seize (type all 5 If you need to seize all roles).
seize pdc
seize rid master
seize infrastructure master
seize schema master
seize domain naming master