DC migration

 Step -1 Install new server and join to existing DC. 

Step -2 Add roles (Active Directory and DNS Server)

Step- 3 Promote the new server to a domain controller

Step -4 Operation Master (Active Directory Users and Computer)

Change 3 menu

 Step -5 Operation Master (Active Directory Domain and Trust)

Change 1 menu

Check in power shell - netdom query fsmo

Step - 6 regsvr32 schmmgmt.dll

Step-7 Windows+R and mmc Enter

Add "Active Directory Schema"

Step-8 Right Click -> Change Active Directory Domain Controller

Step-9 Right Click ->Operation Master -> Change

Step- 10 Active Directory Sites and Service -> Default Site Name ->NTDS Setting ->properties

uncheck - GC