Isapi_Rewrite is installed on all our Windows servers.

Version 2 is installed on servers HNODE2, HNODE3 and VPS5 and needs an httpd.ini file in the root folder (wwwroot) of the domain

http://www.isapirewrite.com/docs/

Version 3 is installed on servers HNODE7, VNODE1, VNODE2, VNODE8, VNODE9 and VNODE10 and needs a .htaccess file in the root folder (wwwroot) of the domain

http://www.helicontech.com/isapi_rewrite/doc/

You can find which server your domain is hosted on under "Website Settings" for the domain in Helm