My enterprise has rented a dedicated server to an external hosting enterprise.

The machine hostname is (for exemple): enterprise.dedi.hosting.net, however I'm trying to install zimbra for our domain enterprise.com. Must I change the hostname machine?

If I don't change it, I can't retrieve webpages entering either enterprise.dedi.hosting.net:81 neither enterprise.com:81.

We installed apache, and then I use 81 port for zimbra to avoid port conflicts.