You should remember you could only make use of the command line emigrate from servers with tailor made hosting, rather than the Plesk interface. For your HA cluster, that means a catastrophe just about every 30 min. I also created two subscriptions: 1 with the ‘Plesk Default Web page’, and https://knoxgxmjy.cosmicwiki.com/796756/not_known_details_about_plesk_install_service