Data Integration to X3

Hello,

We have a system which does the project invoicing. That system use MS SQL as database. We want to integrate that system invoices to Sage X3 AR invoices. What is the easiest way to do that? I heard if we can generate the AR invoicing import *dat files via a program, then X3 can read it automatically time to time and upload it. Is it possible in X3 or any other best way to integrate invoices ? Please help.

Eric