On the Platform Server
Overview form, change the External Name of the server as needed. For CP
servers, the address listed here is used for the variable $CPIPs in new reseller and new organization email
templates. If you have multiple CP servers, the external name value
of every CP server is displayed by the $CPIPs variable. If you do not
want your customers to see the IP addresses of all of your CP servers,
leave the External Name blank. At least one CP server must have an entry
in the External Name field, however.