QuickBooks connection Diagnostic tool is an important tool for QuickBooks desktop users when encountering network issues like errors while accessing company files or database connectivity issues.
This tool ensure that QuickBooks users perform their accounting and bookkeeping functions smoothly by automatically diagnosing and troubleshooting issues saving valuable time for users while eliminating interruptions.

QuickBooks Connection Diagnostic Tool is created by Intuit which is an utility tool built for QuickBooks users to fix multi-user connectivity and network errors which exists while opening company files in the software.
Its created to troubleshoot 6000 series of errors. This tool is used to fix errors in QuickBooks desktop 2013 and in older versions of QuickBooks.
This tool is compatible for Windows 7, Windows Vista, as well as Windows XP operating systems. The best thing about this tool is it automatically identifies and resolve errors generated in particular QuickBooks software.

· Windows 7, Windows Vista, as well as Windows XP operating systems.
· QuickBooks 2008 versions and newer versions.
Note: this information is applicable only if you are using QuickBooks 2013 or old versions on Windows 7 and old versions of operating system.
· Some of the most common areas where you can use QuickBooks Connection Diagnostic tool –
· When error related to improper functioning of QuickBooks Database Server Manager occurs.
· If company files access are limited by windows firewall misconfiguration settings.
· If QuickBooks company files get damaged or corrupted.
· If you identify a customer list and an empty vendor.
· Errors related to QuickBooks 6000 series like 6150, 6000-82, 6000-301, 6147, and 6103 occurs.
· For occurrence of Quickbooks errors like H101, H303, H202, and H505, you can use the tool.
· If there is some issues with firewall port in windows.
· To resolve QuickBooks errors such as 1722, 1311, 1603, 1618, 1723, and 1336; updating windows, verification of permissions and while performing a clean installation of QuickBooks.
| QuickBooks error 6210 | QuickBooks error 6000 | QuickBooks error 6123 | QuickBooks error 6189 |
| QuickBooks error 6000 80 | QuickBooks error 6177 | QuickBooks Error 6144 82 | QuickBooks error 15215 |
| QuickBooks error 6175 | QuickBooks error 12007 | QuickBooks error 6000 77 | QuickBooks Error 6150 |
| QuickBooks error H202 | QuickBooks error H505 | QuickBooks 6000 83 | QuickBooks Error 6210 |
Issues -
· Unable to connect to Quickbooks software.
· Firewall port issues.
· Corrupted Quickbooks company file.
· Missing company files.
· In some scenarios, vendor list is empty in Quickbooks.
Before starting to use QuickBooks Connection Diagnostic tool, make sure to go through below points :
· Download this tool from the official website of Intuit.
· Verify QuickBooks version compatibility for windows operating system.
· Running this tool along with administrative privileges.
· Shut down your QuickBooks software before using the tool.
· Creating data backup of QuickBooks company file.
· Go to officilal site of Intuit.
· Download QuickBooks connection Diagnostic Tool.
· Wait until the download completes.
· Check the box mentioning terms and conditions.
· Your download and installation process will be finished.
Firewall Status option – Firewall issues hinders QuickBooks functions while disabling many programs. This tab helps in fixing such issues.
Diagnose connection – This tab helps the users to access the company file doesn’t matter whether it’s in single mode or multi-user mode.
Testing connection – It helps in checking internet connection speed and stability between different networks.
· Find QuickBooks file.
· Use only the Linux operating system.
· Choose Modify hosting server.
· A message will be displayed mentioning, “Not Applicable” for every status.
· It will become green color when the test will start.
· Tap On Test Connectivity.
· If the red color appears, it means test is unsuccessful.
· Move to Advanced options.
· Now run the QuickBooks connection diagnostic tool.
· Open QuickBooks software.
· Make sure to use a file which is not damaged.
· Tap on Utilities and repair.
· Choose Network problems.
· Tap Yes when the message is displayed.
· Go to folder where you have saved the QuickBooks file.
· Choose Show Advanced Settings and a list will be appeared.
· Mention your log in id and password.
· Finally, tap on QuickBooks Connection Diagnostic tool.
As mentioned earlier, QuickBooks Connection Diagnostic tool works for Quickbooks desktop 2013 and earlier versions.
Follow below steps to download and install the tool hub :
· Download QuickBooks Tool hub from trusted source or from official site of Intuit.
· Make sure to download recent version i.e., 1.6.0.8.
· Open that downloaded .exe file to start the installation.
· After finishing the installation process, start the QuickBooks tool hub software.
· Move to Company files tab.
· Choose QuickBooks File Doctor option.
· Choose company file in the drop-down list of QuickBooks file doctor.
· If you cannot find it, choose Browse and Search option.
· Choose the company file in which you are having issues.
· Click on Network option.
· Tap Continue.
· Enter your admin account credentials.
Below you will find various instructions to use different options mentioned in the QuickBooks Desktop Connection Diagnostic tool to fix company file issues in QuickBooks.
There are two options
Diagnose Connection tab

This tab includes three different sections for different resolving process :
Product information – In this, you will get recent version of QuickBooks which you are using, your hosting status as well as your TCP/IP protocol status.
Firewall status :
This section displays Windows firewall port configuration as well as standard firewall application status. You will also be able to open Quickbooks ports.
Scan folders –

In this tab, you can add QuickBooks folder as well as scan it to find the company files in it.
When the file is connected to the Connection Diagnostic tool, you will be able to view the files ND file status, permission status as well as folder shared status.

In this section, you will be able to access the logs generated by the QuickBooks application as well as upload them to Intuit site for further tracking and investigation.
After properly downloading and installing the QuickBooks Desktop connection diagnostic tool, you have to fix standard company file connection errors.
· Start QuickBooks desktop.
· Shut down the company file if its opened.
· Move to File tab.
· Choose utilities.
· Choose Repair file and Network problems.
· Go to Network problems tab.
· Go to that folder where you have saved the company file.
· Open that file.
· Select Show Advanced settings
· Choose the issues which you are dealing with the program.
· When instructed, mention your login details.
· Choose the QuickBooks Connection Diagnostic tool.
Go through the below points :
The QuickBooks Connection Diagnostic tool completely depends on three components :
.NET Framework for functioning tool execution and rendering interface.
MSXML for reading QuickBooks data structure
C++ Redistributables – This is used for running core runtime operations.
If there is any missing or outdated then the tool will be crashed.
The QuickBooks Connection Diagnostic tool is created for Windows and fails on MacOS due to following reasons :
On the following scenarios, its recommended to switch from diagnostic tool to QuickBooks tool hub
In order to keep the QuickBooks Connection Diagnostic tool running smoothly, follow below points:
QuickBooks Connection Diagnostic tool is a crucial resource for all QuickBooks users to resolve issues. It must be used in alignment with right proven troubleshooting methods and mustn’t rely on this tool completely for all QuickBooks errors and issues.
If you have any trouble to use this tool then you can connect to our Expert Proadvisors team from our toll-free number [number]
1. How do I fix error 6123 in QuickBooks?
This error occurs while restoring or opening the company file. To fix it, you have to run the QuickBooks tool hub and use QuickBooks file doctor tool.
If the issue still exists, then create data backup of company file to new different location. In case the error still persists, then connect to Expert Proadvisor experts.
2. How to start QuickBooks in multi-user mode?
To begin QuickBooks in a multi-user mode, make sure the company file is saved on that system which will host the file server. Open QuickBooks software on the server system and move to file menu. Choose Utilities. Select Host Multi-user access.
· Confirm the action mentioned in the pop-up window.
· Now restore the company file.
· Make sure the opened file in multi-user mode box is marked.
3. How do I fix network connection failure in QuickBooks?
· To fix this issue, make sure you have stable internet connection working properly.
· Now update QuickBooks software.
· Verify firewall / antivirus settings.
· Finally, use the QuickBooks Connection Diagnostic tool to resolve network issues.
4. How to use the QuickBooks Connection Diagnostic Tool?
· In order to use Quickbooks Connection Diagnostic tool, download to install it from trusted source like Quickbooks site.
· Run that tool. Choose your company file.
· Follow on-screen instructions to fix network connection issues.
5. Can I use the QuickBooks Connection Diagnostic tool to fix other QuickBooks issues?
Yes the tool resolve diverse QuickBooks errors and issues which includes network connectivity, data file errors, downloading and updating problems as well as company file issues.
The tool automatically diagnose common QuickBooks issues which saves time so that users can work without interruptions.
6. What is the most recent version of the QuickBooks Desktop connection diagnostic tool?
The most current version of QuickBooks desktop connection diagnostic tool is combined with the Quickbooks tool hub version 1.6.0.8. You have to download it and install it with recent QuickBooks tool hub from the Intuit’s site.
7. What is the size of the QB connection diagnostic tool’s setup file, and does it support 64-bit operating systems?
The QuickBooks Connection Diagnostic tool is not a single file rather its combined in another tool i.e., QuickBooks tool hub which needs a setup file with .exe extension. Its compatible with 64 bit windows operating system particularly Windows 10, Windows 8.1 and later versions.