QuickBooks Error H101: Troubleshooting Steps to Resolve Multi-User Hosting Issues

QuickBooks Error H101 is a common issue encountered by QuickBooks users when attempting to access a company file in multi-user mode. This error typically occurs when the computer hosting the QuickBooks company file is unable to communicate with other workstations over the network. It can be frustrating as it prevents users from collaborating and accessing the company file simultaneously. In this comprehensive guide, we will provide detailed troubleshooting steps to resolve QuickBooks Error H101 and enable smooth multi-user hosting functionality.

Causes of QuickBooks Error H101:

  1. Incorrect hosting configuration settings: Misconfigured hosting settings in QuickBooks can lead to Error H101.
  2. Firewall or antivirus software blocking incoming/outgoing communication: Security software settings may prevent the computer hosting the company file from communicating with other workstations, resulting in Error H101.
  3. Network issues: Problems with the network connection, such as a weak or unstable network, can cause communication errors and trigger Error H101.
  4. Damaged or corrupted QuickBooks company file: If the QuickBooks company file is damaged or corrupted, it can lead to Error H101 when accessing it in multi-user mode.

Now, let’s proceed to the troubleshooting steps to resolve QuickBooks Error H101:

Step 1: Verify Hosting Settings on the Server/Host Computer

  1. Open QuickBooks on the computer hosting the company file.
  2. Go to the File menu and select “Utilities.”
  3. If the “Host Multi-User Access” option is listed, select it to turn on hosting. If it shows “Stop Hosting Multi-User Access,” hosting is already enabled.
  4. If hosting needs to be turned on, click on the “Host Multi-User Access” option.
  5. Restart QuickBooks and check if the Error H101 is resolved.

Step 2: Update QuickBooks to the Latest Version

  1. Open QuickBooks and go to the Help menu.
  2. Select “Update QuickBooks” and follow the on-screen instructions to download and install the latest updates.
  3. After the update is complete, restart QuickBooks and check if Error H101 persists.

Step 3: Verify Firewall and Antivirus Settings

  1. Temporarily disable your antivirus software or adjust its settings to allow QuickBooks through the firewall.
  2. Consult the documentation or support resources for your antivirus software to learn how to add exceptions for QuickBooks processes and ports.
  3. If you’re using the Windows Firewall, follow these steps:
    • Press the Windows key + R on your keyboard to open the Run dialog box.
    • Type “firewall.cpl” in the dialog box and press Enter.
    • Click on “Allow an app or feature through Windows Firewall” on the left-hand side.
    • Click on the “Change settings” button (requires administrator access).
    • Scroll down and ensure that both QuickBooks Desktop and QBDBMGRN.exe (QuickBooksDBXX) are allowed through the firewall. If not, click on the checkboxes next to them and click OK.
    • Restart QuickBooks and check if Error H101 is resolved.

Step 4: Add QuickBooks Ports as Exceptions in Firewall

  1. Open the Windows Firewall settings as mentioned in Step 3.
  2. Click on “Advanced settings” on the left-hand side.
  3. In the Inbound Rules section, click on “New Rule” from the right-hand side.
  4. Select “Port” and click Next.
  5. Enter the specific ports required for QuickBooks:
    • QuickBooks Desktop 2018: Ports 8019, 56728, 55378-55382
    • QuickBooks Desktop 2019: Ports 8019, 56729, 55383-55387
    • QuickBooks Desktop 2020: Ports 8019, 56730, 55388-55392
    • QuickBooks Desktop 2021: Ports 8019, 56731, 55393-55397
  6. Select “Allow the connection” and click Next.
  7. Ensure that all three network types (Domain, Private, Public) are selected.
  8. Enter a name for the rule (e.g., QuickBooks Ports) and click Finish.
  9. Restart QuickBooks and check if Error H101 is resolved.

Step 5: Create a New Folder for the QuickBooks Company File

  1. Create a new folder on the server or host computer.
  2. Share the new folder and set the appropriate folder permissions for other workstations to access it.
  3. Copy the QuickBooks company file (.qbw) to the newly created folder.
  4. Open QuickBooks and access the company file from the new location.
  5. Check if Error H101 is resolved.

Step 6: Use QuickBooks File Doctor

  1. Download and install QuickBooks File Doctor, a diagnostic tool provided by Intuit.
  2. Open QuickBooks File Doctor and select the company file from the list.
  3. Follow the on-screen instructions to let QuickBooks File Doctor scan and repair any issues with the company file and network connection.
  4. After the repair process is complete, check if Error H101 is resolved.

Step 7: Contact Technical Support If none of the above solutions resolve QuickBooks Error H101, it is recommended to contact the official QuickBooks technical support team or consult with a certified QuickBooks professional for further assistance. They can provide more advanced troubleshooting steps tailored to your specific situation.


QuickBooks Error H101 can disrupt multi-user hosting functionality in QuickBooks, hindering collaboration and access to the company file. By following the troubleshooting steps outlined in this guide, you can effectively diagnose and resolve Error H101. Verify hosting settings, update QuickBooks, verify firewall and antivirus settings, add QuickBooks ports as exceptions in the firewall, create a new folder for the company file, use QuickBooks File Doctor, and contact technical support if needed. With these steps, you can overcome QuickBooks Error H101 and restore smooth multi-user access to the company file.

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