I've a load balanced server on production environment for my application. The server is on Windows Server 2008 R2. I'm running a web application that creates and save a file into a folder on the web path. So I need to create a job that copy this file into another server. 
The main idea is that a file watcher checks for the file and then copy it instantly. But how can I know in what server it's the file?

Please avoid "why you don't" answers to get a directly answer, if it's someone.