I've just installed OCS Server on my ubuntu 16.04 and I'm about to install Agent. I've used an alias for virtual host as follows :
<VirtualHost *:80>
# ...
DocumentRoot /var/www/html
Alias /ocsreports "/usr/share/ocsinventory-reports/ocsreports/"
</VirtualHost>
Now I don't know how to do so for the server url as needed (following image)http://wiki.ocsinventory-ng.org/index.php?title=Documentation:WindowsAgent