Deny access to the /documentconverterws proxypass via http://httpd.apache.org/docs/2.2/mod/mod_authz_host.html . The customer has to apply the chages himself. Examples can be found in the proxy_http.conf distributed as part of the open-xchange-server or at http://oxpedia.org/wiki/index.php?title=AppSuite:Grizzly#Apache_configurat ion