How to Fix QuickBooks Error H303 Problem with Multi User Hosting?

Copper Contributor

QuickBooks Error H303 typically occurs when QuickBooks is unable to establish a connection with the company file located on another computer. This error usually indicates a problem with the network setup or configuration. Here's a detailed troubleshooting guide to help you resolve QuickBooks Error H303 and get back to work seamlessly.

  1. Check Network Connectivity: Ensure that all computers involved are connected to the same network. Verify network cables, Wi-Fi connections, and routers to ensure there are no connectivity issues.

  2. Verify Hosting Settings: Confirm that only the server or the computer hosting the company file is set to host multi-user access. To check hosting settings:

    • Open QuickBooks on the hosting computer.
    • Navigate to the File menu and select Utilities.
    • If the option 'Stop Hosting Multi-User Access' is available, click on it. If it says 'Host Multi-User Access,' then the hosting settings are correct.
    • On other computers, hosting should be turned off.
  3. Update QuickBooks to the Latest Release: Ensure QuickBooks is updated to the latest release on all computers. Updates often contain bug fixes and improvements that can resolve errors like H303. To update QuickBooks:

    • Open QuickBooks and navigate to the Help menu.
    • Select Update QuickBooks Desktop and then click on Update Now.
    • Follow the on-screen instructions to complete the update process.
  4. Configure Firewall and Security Software: Firewall or security software may sometimes block QuickBooks from accessing the necessary ports for communication. Configure firewall settings to allow QuickBooks through:

    • Add QuickBooks executable files to the exceptions list of your firewall.
    • Ensure that ports 8019, 56728, 55378-55382 are allowed through the firewall.
  5. Edit Hosts File: You may need to edit the hosts file on each computer to ensure they can communicate with each other. Follow these steps:

    • Close QuickBooks on all computers.
    • Open Notepad as an administrator.
    • Navigate to C:\Windows\System32\drivers\etc and open the hosts file.
    • Add the IP address and computer name of all computers involved, separated by tabs.
    • Save the changes and close Notepad.
  6. Use QuickBooks File Doctor: QuickBooks File Doctor is a tool provided by Intuit to diagnose and fix common QuickBooks errors, including H303. Download and run the tool to scan and repair network issues with QuickBooks company files.

  7. Consult with IT Professional: If you're still unable to resolve QuickBooks Error H303 after following the above steps, it might be beneficial to consult with an IT professional. They can perform advanced troubleshooting and ensure your network setup is configured correctly.

By following these troubleshooting steps, you should be able to resolve QuickBooks Error H303 and regain access to your company file without any further disruptions.

 

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