I have created a new web server, so now there are two web servers managed by ISPConfig 3. I have created new clients and put them to the new web server, that works. But now I want to move an existing clients web site from old web server to new web server. Do I have to make all the changes manually to /etc/passwd, /etc/group and /var/www directories et. al.? The drop down menus in ISPConfig web interface do not offer the new web server nor it's IP number.