Here I discuss how to configure additional domain controller (ADC) also discuss migrate windows server 2012 R2 to windows server 2016
1. Domain Controller (DC) is now Windows Srv 2012 R2
2. you should see my video (Configure AD and DS windows server 2012 R2 | bangla Part-03) before configure ADC
#SetupADCWindowsServer
#ConfigureAdditionalDomainController
#ADCStepbyStep
If you complete Migrate/Transfer FSMO role you must see (Part-6 is the part of this video)