Export and Import DHCP Reservations for Windows Server

Export the DHCP reservation list on A server,

netsh dhcp server [ip address] scope [scope address] dump > reservation_list.txt
e.g. netsh dhcp server 172.17.32.131 scope 172.17.32.0 dump > reservation_list.txt

Edit the exported file in notepad 'reservation_list.txt' , Simply do a Find and Replace for the A server IP you ran the export on and change to the B server IP you are importing to and remove out everything else in the text file except for the reservations config section.

Import the DHCP reservation list:
netsh exec reservation_list.txt