one of customers deploys zimbra(5.0.9) in 2-server environment, like :
and they're planning to change them to :
so that they can apply the commercial certificate for : webmail.example.com and set tls mode to "redirect".
i've read the wiki article here: ZmSetServerName - Zimbra :: Wiki , and i found in step#8
could someone address this statement more clearly which corresponding files need to be changed in my ms2.example.com ??8. Reboot
(Those in multi-server setups: Be sure to change any corresponding references to the old hostname & restart services on all hosts)