iPrint Appliance 4.x won't allow hostname starting with a number

When deploying an iPrint Appliance version 4.0 and defining the hostname, the configuration tool won't allow a hostname starting with a number.  This can be problematic because previous versions of the iPrint Appliance allowed this. When upgrading from 3.x to 4.x, it is important to retain the same hostname for certificate and iPrint printer binding reasons.

Contact Micro Focus support for a resolution.

DNS RFC standards specifically disallow DNS names starting with a number.  Earlier versions of the Appliance allowed this.  iPrint Appliance 4.0 is now compliant with this standard.