How to Migrate DHCP to a New Windows Server
On the current server, use netsh to dump your DHCP settings to a text file:
netsh -c dhcp server 192.168.5.9 scope 192.168.5.0 dump > c:dhcpdump.txt
Note – the line above should use your actual server IP and scope.
On the new server, use netsh to execute a the dump file you just created:
netsh exec c:dhcpdump.txt
Note – you should edit the dump file to include the IP of the new server before importing it.