When renaming a new Enterprise Server a validation error is received that states:
"Validation failed for property 'HttpPort' Path: 'Enterprise Server/HttpPort' Type 'HttpPort'
The value '0' is outside the range of allowed values
Whilst this issue may at first appear to be an issue with port assignment. It is in fact an issue with the Enterprise Server certificate. Typically this occurs when a backup containing a base configuration has been used to create the new Enterprise Server.
Remove the Active certificate, please see EBO Webhelp for instructions on how to remove a certificate