How to change the IP address for domains/clients/resellers in Plesk for Linux?
Switch all existing domains to a single IP address that exists in the system:
Run the following command:
# for i in $(plesk bin subscription -l); do plesk bin subscription -u "$i" -ip <ip_address>; done
Note: <ip_address> here is the IP address that will be used instead of the current one. This IP must exist in the system.