Billir

Does anyone know how to make Express Invoice run as a service on a Windows 2012 Essentials Server? The web server part of the application runs well in Windows 8.1 Pro but I would like to run it on the Win 2012 server so the licences users could login from the office workstations. I know if you start up the web service from the app you can log out of the users profile and the web service will survive - but will not survive a restart. Thank