On the new server run:
- Install DHCP server role on the new server but make sure it is not started.
- Export-DHCPServer –Computername (SourceComputerName) c:\dhcp.xml -ver
- Stop DHCP server on the source server and start it on the target server
- Import-DHCPServer –Computername (DestinationServer) c:\dhcp.xml –BackupPath c:\dhcpbackup and type Y to accept
- Check scope and change server option so that DNS is set correct etcetra