In 2012, QuickBooks file doctor was introduced. QuickBooks file doctor was used to resolve certain problems with QuickBooks company files. There was another tool for checking network connectivity called QuickBooks network connectivity tool (QNCD). Later in the same year Intuit combined both of these tools into one single tool called QuickBooks file doctor.
QBFD is bundled with QuickBooks 2014 R5 and later versions. QBFD can be downloaded from Official Intuit website.
File doctor can helpful if you are facing network issues with your QuickBooks company file hosted in multi user environment. It can be useful in diagnosing and fixing network errors with H202 series. However, you can also use this tool if you have errors in your company file including error codes such as (6000 -82, 6150, 6000 -305, 6000 -301, 6147, 6130).
QuickBooks file doctor does not supports company files that are larger than 2 gigabytes thus these company files must be sent to Intuit data services for error resolution and correction.