Communicating with Microsoft Dynamics NAV Client


My name is Sofiene Zine, I’m an engineering student trying to develop an APS ( for Dynamics NAV 2013 R2 to make it multi-tenant (SAAS). I need to know if there’s documentation or a guide to explain how to communicate with the NAV product, something like an API Restful.

Thank you

Why would you need to “make it multi-tenant”, when it already is?