As of March 1st, 2016, Intuit will discontinue the Intuit Sync Manager which MyCase uses to sync data with QuickBooks Desktop software.
OVERVIEW
We will no longer accept new requests to integrate Quickbooks Desktop (which is the version that installs directly on your computer) because of this. QuickBooks online functionality is not impacted, and MyCase has no plans to stop syncing with the online version of QuickBooks.
More information on this topic can be found on Intuit's Developer Blog here: https://developer.intuit.com/blog/2014/09/08/timeline-to-discontinue-the-quickbooks-desktop-rest-api