SysAdminGear

If you are running Plesk and you need to change the default page "Plesk Default Page" you just need to change the index.html file on /var/www/vhosts/default/htdocs

Login your server as root and

# nano /var/www/vhosts/default/htdocs/index.html

If you are using Plesk on a Windows Server please check that directory:

%plesk_vhosts%\default\htdocs