Can I change current server domain in ISPConfig to another domain that is also hosted on server? If yes, then on what pages i need to make changes? Do I have also to change something in Debian Etch along with ISPConfig changes?
Change the domain in ISPConfig under management > server > settings and on the shell in the files /etc/hostname, /etc/mailname, /etc/postfix/main.cf, /etc/hosts, /home/admispconfig/ispconfig/lib/config.inc.php. Dont worry if one of the files does not exist on your system, you can leave this out.