1. create local admin password
  2. create nic teaming if multiple nic are present
  3. rename server 2019
  4. configure static ip on the new-server - dns>old-server
  5. raise the forest functional level and domain functional level to w2008r2
  6. netdom query fsmo
  7. join new-server to a domain and sign to new-server with domain admin account
  8. create additional domain controller (ADC) on new-server and promote it to DC
  9. migrate from fsr to dfsr if needed
  10. transfer FSMO roles from old-server to new-server
  11. backup old DHCP, deauthorize, authorize, and restore DHCP: PS or GUI.

Export-DhcpServer -File C:\DHCPDB\DHCPDB.xml -Leases -Force -ComputerName <ServerName> –Verbose