This tool is also capable of troubleshooting network, multi-user and many other errors while using or attempting to use a . QB desktop uses core Microsoft components and if any component is missing or not functioning, the situation may trigger errors. The connection diagnostic tool is compatible only with Microsoft Windows 7, Windows Vista, or Windows XP with QuickBooks 2008 and later versions. 

 How to Use QuickBooks connection diagnostic tool? 

Open the QuickBooks Connection Diagnostic Tool on your screen and follow the instructions given below.

Step 1: Diagnose Connection Tab

It lets you check the system set up and to be sure that the company file can be used from any system whether you work on single-user mode or multi-user mode. If you dont have the proper permission or the ports or system firewall is blocked, you may receive errors.

Step 2: Firewall Status

This tab informs you about the basic instructions of the system firewall.

Step 3: Test Connectivity