Windows server R2 Active Directory with Environment migration

Migration Scenarios for domain controllers:
1 Backup Domain control
2 Make a new operating system (preferably the same as the original operating system version)
3 Use this computer as an additional domain controller
4 Installing DNS to replicate DNS replication between primary and additional domain-controlled domains
5 Transfer the primary domain-controlled 5 roles to the additional domain control

5.1 Command line View FSMO role: Netdom query FSMO
5.2 Note the following issues when transferring hosts:
-the domain controller with the operations master role must always be online during the transfer of the host role;
-Operation master Transfer process supports reverse operation;
-domain naming master, PDC Emulator, Relative Identifier master, Infrastructure master roles can be implemented using the graphical interface and the "Ntdsutil" command line, The Schema master role can only be transferred using the command line method;

Note: When the five major roles of the main control are occupied by additional domain control, the additional domain control becomes the real master DC. and the primary control DC becomes an additional domain control. You can point DNS to a new DC. Changing the IP of the new DC host to the IP of the original DC host is not recommended. There is a risk in doing so.

Windows server R2 Active Directory with Environment migration