Resolving QuickBooks Error OL-393: Causes, Effects, and Solutions

Karen Edith
5 min readJul 15, 2024

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QuickBooks serves as a vital tool for businesses to manage their finances efficiently. However, encountering errors such as QuickBooks Error OL-393 can disrupt these operations. In this blog, we delve into the details of QuickBooks Error OL-393, exploring its causes, effects, and providing comprehensive troubleshooting solutions to help you resolve it effectively.

Understanding QuickBooks Error OL-393

QuickBooks Error OL-393 belongs to the OL series errors related to online banking. It typically occurs when there is an issue with the connection between QuickBooks and your bank’s servers during the process of downloading transactions. This error can manifest as the inability to connect to your bank, failure to download transactions, or intermittent connectivity issues.

Common Causes of QuickBooks Error OL-393

To effectively troubleshoot QuickBooks Error OL-393, it’s crucial to understand its potential causes:

  1. Bank Server Issues: Temporary issues or maintenance activities on the bank’s server can disrupt the communication between QuickBooks and the bank.
  2. Internet Connectivity Problems: A weak or unstable internet connection can lead to interruptions in data transmission between QuickBooks and the bank’s servers.
  3. Outdated QuickBooks Version: Using an outdated version of QuickBooks may cause compatibility issues with the bank’s updated security protocols or server configurations.
  4. Corrupted Company File: Damage or corruption in the company file related to online banking operations within QuickBooks can trigger this error.
  5. Incorrect Bank Information: Incorrectly configured or outdated bank information in QuickBooks can lead to authentication failures during the connection process.

Troubleshooting Solutions for QuickBooks Error OL-393

Now, let’s explore the step-by-step troubleshooting solutions to resolve QuickBooks Error OL-393:

Solution 1: Verify Internet Connectivity and QuickBooks Updates

Start by ensuring that your internet connection is stable and that QuickBooks is updated to the latest version:

Check Internet Connectivity:

  • Ensure your internet connection is active and stable.
  • If using Wi-Fi, consider switching to a wired connection for better stability.

Update QuickBooks:

  • Open QuickBooks and navigate to the Help menu.
  • Select Update QuickBooks Desktop.
  • Follow the prompts to download and install any available updates.
  • After updating, restart QuickBooks and attempt to connect to your bank to see if the error persists.

Solution 2: Verify and Update Bank Login Credentials

Ensure that the bank login credentials stored in QuickBooks are correct and up-to-date:

Update Bank Login Information:

  • Open QuickBooks and navigate to the Banking menu.
  • Select the account where you are experiencing the error.
  • Click on the Edit ✎ icon next to the account name.
  • In the Edit Account Info window, go to the Online Services tab.
  • Click Edit ✎ next to the bank name.
  • Update your bank login credentials (username and password).
  • Click Save and then Update Now to refresh the connection with the updated credentials.

Test the Connection:

  • After updating your credentials, attempt to download transactions again to check if the error is resolved.
  • If the error persists, proceed to the next solution.

Solution 3: Refresh Online Banking Setup

Refreshing the online banking setup in QuickBooks can resolve connectivity issues and refresh the connection with the bank’s servers:

Deactivate Online Services:

  • Navigate to the Banking menu and select the account showing the error.
  • Click on the Edit ✎ icon next to the account name.
  • In the Edit Account Info window, go to the Online Services tab.
  • Click Deactivate All Online Services and confirm your choice.

Set Up Online Services Again:

  • After deactivating, click on Set Up Now to re-enable online services.
  • Follow the prompts to re-enter your bank login credentials and set up online banking again.
  • Once completed, attempt to download transactions to check if the error is resolved.

Solution 4: Update Windows and QuickBooks Components

Ensure that both your Windows operating system and QuickBooks components are up-to-date:

Update Windows:

  • Go to the Start menu, type Windows Update, and open Windows Update settings.
  • Check for any available updates and install them.
  • Restart your computer after installing updates.

Update QuickBooks Components:

  • Open QuickBooks and navigate to the Help menu.
  • Select Update QuickBooks Desktop.
  • Follow the prompts to download and install any available updates.
  • After updating, restart QuickBooks and attempt to connect to your bank to see if the error persists.

Solution 5: Check Firewall and Security Software Settings

Firewall or security software settings on your computer can sometimes block QuickBooks from establishing a secure connection with the bank’s servers:

  1. Configure Firewall Settings:
  • Temporarily disable the firewall or security software on your computer.
  • Attempt to connect to your bank through QuickBooks to see if the error is resolved.
  • If disabling the firewall resolves the issue, adjust the settings to allow QuickBooks to communicate through the firewall securely.

Solution 6: Repair QuickBooks Installation

If QuickBooks Error OL-393 persists after trying the above solutions, repairing your QuickBooks installation may resolve underlying software issues:

Close QuickBooks:

  • Ensure QuickBooks is closed completely before proceeding.

Repair QuickBooks:

  • Open the Control Panel on your computer and navigate to Programs > Programs and Features.
  • Locate QuickBooks in the list of installed programs and select Uninstall/Change.
  • In the QuickBooks installation window, select Repair and follow the on-screen instructions to repair the installation.
  • After repairing, restart your computer and reopen QuickBooks to test if the error is resolved.

Solution 7: Consult QuickBooks Support

If you have exhausted all the above solutions and QuickBooks Error OL-393 persists, seeking assistance from QuickBooks support professionals is advisable:

Contact QuickBooks Support:

  • Visit the QuickBooks support website or contact their customer support directly.
  • Provide details about the troubleshooting steps you’ve already taken and describe the specific issues you’re facing.
  • QuickBooks support can provide further guidance, troubleshoot remotely if needed, or escalate the issue to their technical team for resolution.

Final Thoughts

QuickBooks Error OL-393 can disrupt your financial management tasks, but with systematic troubleshooting, you can resolve it effectively. By ensuring stable internet connectivity, updating QuickBooks and Windows components, verifying and updating bank credentials, adjusting firewall settings if necessary, and refreshing online banking setup, you address the common causes of this error.

Regularly updating QuickBooks and maintaining accurate login credentials are crucial steps to prevent such errors in the future. With persistence and these steps, you can navigate through QuickBooks Error OL-393 with confidence, ensuring minimal disruption to your business operations and financial management tasks.

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Karen Edith
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1-855-409-2300 is the direct support number you can reach out to Karen Edith for any finance-related queries. Karen specializes in small business accounting.