You might get stuck with an issue that QuickBooks Connection has been lost if you fail to access or use the company files. The message that might appear on the screen during this is “The connection to the company file has been lost. QuickBooks must close immediately. Any unsaved data will need to be re-entered.”

Incorrect firewall configuration, wrong folder permissions, or internet settings in Windows are some reasons that can lead you to such an issue. Let’s dig into the page to explore the experts' advice for troubleshooting it.

Know the Origins of a QuickBooks Connection Loss 

In this section, we have listed some primary causes of server connection loss.

• It may occur due to a poor internet connection.

• The issue may arise due to an unstable non-wired network connection.

• A third-party antivirus or firewall can also cause it.

• You may face such issues if the power saving mode is enabled.

• If the company file is stored on an external portable device.

• An outdated QB application can be one of its reasons.

• You are unable to connect to the server if the company files are damaged.

Methods to Use If QuickBooks Connection Has Been Lost

Initially, you can try to run QB as an admin to fix the issue in the first place. If it doesn’t work, implement the methods given below:

Fix 1: Run QB as an admin

• Close QB and right-click on its icon to choose Run as Administrator.

• Try to open the company files once again.

Fix 2: Toggle the UAC settings

Windows 10:

• For this, you need to first close QuickBooks.

• Then, press the Windows key on the keyboard.

• Type User Account Control.

• Move to the Settings and choose Change User Account Control Settings.

• Note down the current level and then toggle the slider to the highest setting, Always Notify.

Fix 3: Ensure that the file is not set as Read Only 

• Locate the file in Windows Explorer.

• After this, you need to right-click on the company file (.qbw).

• Now, head over to the General tab.

• Make sure that the Read Only option is not checked.  

• If the box is checked, unmark that and choose OK.

Fix 4: Make sure that the Internet Options settings are accurate

• Head to the Start menu.

• Search for Internet Options and hit Enter.

• Switch to the Advanced tab.

• Swipe down to the Security section and ensure that the following options are marked:

  • Use SSL 2.0

  • Use SSL 3.0

  • Use TLS 1.0

Fix 5: Log in as a Windows administrator

• Tap on the Windows icon present in the lower left corner.

• Choose the Log off option.

• Select the administrator account.

• Enter the password if there is one.

• Finally, try to open the company file.

Summary

Through this blog, we have learned that the QuickBooks connection has been lost due to an internet connection issue, firewall settings, or folder settings. This post suggests configuring Internet Options settings, logging in as a Windows administrator, and toggling the UAC setting. If you are still stuck and want professionals to help, dial TFN and talk to our certified QB advisor. Need quick help fixing the “QuickBooks connection has been lost” error? Call our experts now at +1(800) 780-3064 for instant support.

FAQs

1. Why does QuickBooks say “connection has been lost”?

This error usually occurs due to network interruptions, server issues, or incorrect hosting settings in multi-user mode. Damaged company files or firewall restrictions can also break the connection between the workstation and server.

2. How do I fix the “QuickBooks connection has been lost” error?

You can fix it by checking your internet connection, verifying hosting settings, running QuickBooks File Doctor, and ensuring your firewall allows QuickBooks access. Updating QuickBooks to the latest version also helps resolve this issue.

3. Can a damaged company file cause connection loss in QuickBooks?

Yes, a corrupted or damaged company file can trigger connection issues. Running the QuickBooks File Doctor tool can help repair the file and restore the connection.

4. Why does QuickBooks lose connection in multi-user mode?

In multi-user mode, connection loss often happens due to server downtime, incorrect hosting configuration, or network data file (.ND) issues. Ensuring the server is properly set up and running is essential.

5. Does firewall or antivirus cause QuickBooks connection problems?

Yes, firewall or antivirus settings can block QuickBooks from accessing the network. You need to configure exceptions for QuickBooks ports and services to prevent connection interruptions.