I read this in last changes of ispmanager:
New sites use "public_html" directory for storing HTML and PHP pages. This allows use http://IP_ADDRESS/~siteadmin as a temporary address of a site. Old sites still use "htdocs" directory and need not change anything.
Products: ISPmanager Lite, ISPmanager Professional
But I see that new hosts don't use public_html folder and I can't access temporally to
http://IP_ADDRESS/~siteadmin
Is this feature actived?