diff --git a/conf/nginx.conf b/conf/nginx.conf
index c3be9a9..5dfda08 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -13,6 +13,7 @@ location /Microsoft-Server-ActiveSync {
               include fastcgi_params;
               fastcgi_param HTTPS on;
               fastcgi_read_timeout 630;
+              fastcgi_param SCRIPT_FILENAME $request_filename;
        }
 
 # Include SSOWAT user panel.