Hey Dean,

you will need to get a license for the new server. if you have subscription licensing, then just pass the new server's name to your nintex partner and they'll get a new license for you.

if you're in classic licensing then you will need to purchase a new license for workflow and forms and pass the new server's name to your partner.

once this is done you can add the server to the farm. It should get all required features and solutions in the extension process so no additional installation of nintex should be required.

Best regards,

Enrico

What if they are on Perpetual?

Thanks,