QuickBooks Foundational Class (QBFC) is an application made by Intuit, the makers of QuickBooks, which must be installed to facilitate the relationship between any integrating software and QuickBooks.
This application must be installed on a PC where both The Edge and QuickBooks are installed, where you plan to map accounts or post from Edge to QuickBooks. A compatible version of QBFC can be found on the www.edgeuser.com website in the pre-requisites section under downloads.