How to Fix QuickBooks Error H101: Causes, Symptoms

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QuickBooks, a leading accounting software used by small to medium-sized businesses, occasionally needs help with its performance. One such problem is QuickBooks Error H101. This error typically arises when you try to access company files located on another computer and that computer needs additional installation and setup. Understanding the causes and solutions for Error H101 is vital for uninterrupted financial management and accounting.

What is QuickBooks Error H101?

Error H101 in QuickBooks indicates that the system where the QuickBooks company file is stored requires additional configuration to allow other computers on the network to access the file. This error falls under the QuickBooks Multi-User Operational Errors category, including errors like H202, H303, and H505. H101 can disrupt workflow, leading to delays and potential data discrepancies.

Causes of QuickBooks Error H101

Several factors can trigger this error:

  • Incorrect hosting configuration settings.
  • The computer cannot communicate with the server where the file is stored.
  • Faulty QuickBooks File hosting settings or services.
  • Firewall settings that block communication between computers.
  • Damaged or incorrect.ND files, which enable QuickBooks to access files in a network.

Symptoms of QuickBooks Error H101

Recognizing the symptoms early can help resolve the issue before it impacts your business operations. Symptoms include:

  • Error H101 appears and crashes the active program window.
  • Your PC frequently crashes with Error H101 when running the same program.
  • Windows runs sluggishly and responds slowly to mouse or keyboard input.
  • Your computer periodically “freezes” for a few seconds at a time.

Configuring Firewall Settings to Resolve QuickBooks Error H101

Configuring your firewall correctly is critical in Resolving QuickBooks Error H101 and ensuring that communication between your network’s computers and the server hosting your QuickBooks company file is uninterrupted. Misconfigured firewall settings can block this communication, essential for the multi-user mode to function properly. Here’s a detailed step-by-step guide to configure your firewall for QuickBooks:

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Step 1: Access Firewall Settings

  1. Open the Windows Start menu on the computer that’s displaying Error H101.
  2. Type ‘Firewall’ in the search bar, and select ‘Windows Defender Firewall’ from the list of options.

Step 2: Add Firewall Exceptions for QuickBooks

  1. Click ‘Allow an app or feature through Windows Defender Firewall’ on the left sidebar in the Windows Firewall window.
  2. Click ‘ Change settings ‘ at the bottom right of the allowed apps window. Note: You must have administrative privileges to make these changes.
  3. Scroll through the list to find QuickBooks. If QuickBooks is not listed, you must add it by clicking ‘Allow another app…’ at the bottom of the window.
  4. Click ‘Browse’ to locate the QuickBooks executable file. This is typically found in your QuickBooks folder located in the Program Files directory. The file you’re looking for will generally be named ‘QBW32.exe’.
  5. Once you’ve added QuickBooks to the list, check both the ‘Private’ and ‘Public’ boxes to allow QuickBooks to communicate on both network types.

Step 3: Configure Advanced Firewall Settings

  1. If adding QuickBooks as an allowed app does not resolve the issue, you might need to configure the ports QuickBooks uses for incoming and outgoing traffic. Each version of QuickBooks uses a specific set of ports.
  2. Return to the main Windows Defender Firewall window and select Advanced settings.
  3. In the inbound rules, click ‘New Rule’.
  4. Select ‘Port’ and then click ‘Next’.
  5. Choose ‘TCP’ and specify the QuickBooks year-specific ports needed for your version. For instance, QuickBooks Desktop 2020 typically uses the port 8019, 56728, 55378-55382.
  6. Click ‘Next,’ select ‘Allow the connection,’ then click ‘Next’ again.
  7. Ensure that all profiles (Domain, Private, Public) are checked, give the rule a name like “QuickBooks Ports (Year),” and then click ‘Finish.’
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Step 4: Repeat for Outbound Rules

  1. Follow the same steps in the Advanced settings for outbound rules to ensure that traffic to and from these ports is not blocked going out.

Step 5: Test Your Settings

  1. After setting up both inbound and outbound rules, restart your computer and then open QuickBooks.
  2. Access the company file in multi-user mode to see if the error has been resolved.


QuickBooks Error H101 can be a disruption, but understanding its causes and solutions can help mitigate its impact on your business operations. Following the detailed steps above ensures that your QuickBooks setup will run smoothly and efficiently. Consider consulting with a QuickBooks professional if you continue to experience issues or need more detailed guidance specific to your setup.

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