So, after we type http://suporte.enterprise.com in URL address bar, automatically this name changes to IP address number.

What can we do to keep the alias in URL address bar?

Just another thing about this issue...

After alias was configured, in a E-mail notification, the url of ticket appears with alias name. But this link does not work. If we change, the alias to ip number the ticket will be opened.

Note, that if we access the address of alias, the SDP opens correctly. (But the URL address change automatically to IP). The error only occurs when we try to access the links in E-mail notification with alias in URL.