If you want to resolve the network connectivity issue quickly, then you should follow all the steps carefully. First- download this QuickBooks File Doctor tool in your computer and open the QBFD.EXE file. After completing the installation process, the QBFD tool will open automatically. Then select the drop-down list for finding your company file or click on browse. To get further information get in touch with the Intuit certified executives, they will help you with the relevant manner.