QuickBooks Error H303

Eradicate QuickBooks Error H303 with Quick & Convenient Techniques

The H series errors in QuickBooks are infamous for causing issues with the company file functions. One common error of this series, QuickBooks error H303, mostly occurs while running the company files in a multi-user mode and can get triggered due to common issues, like an incorrect hosting configuration. If you are encountering the QuickBooks error code H303 and are unable to access the data files, you can use the solutions given below to address it once and for all.

If you are having trouble understanding the solutions or eliminating the error message on your own, you can reach out to us at 1.855.856.0042 to get direct help from our technical support team.

QuickBooks Desktop Error H303: Possible Triggers and Causes

QuickBooks error message H303 can get triggered due to the common reasons and factors mentioned below –

  • There are connection issues while connecting the company file with the server, which is causing access issues leading to the H303 error.
  • The hosting settings on the server PC or the workstations are incorrect or misconfigured, which is preventing users from accessing the data file.
  • Essential services, like the QuickBooks database service, are not running correctly, and the service might be inactive, turned off, or missing from the system.
  • The DNS settings are incorrect, or the configuration is inappropriate, which is causing security issues while running the company file.

Solutions to Effectively Resolve the QuickBooks Company File Error H303

QuickBooks multi-user error H303 can be easily eradicated by using the solutions provided below –

Solution 1 – Edit the Windows Firewall Settings by Accessing the Control Panel

  • You can dismiss the QB error code H303 by modifying the Windows firewall settings in the following manner –
  • Go to the Windows Start menu to access the Control Panel and open the Firewall Authentication Settings window to select the Allow a Program through Firewall option.
  • Next, access the program lists to choose QuickBooks and select Add Programs to add it to the firewall exception list.
  • Once done, rerun QuickBooks and access the multi-user mode to open your company file on the workstations and check the status of the H303 error message.

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Solution 2 – Modify the QuickBooks Hosting Settings to Re-configure it on the Server and Workstations

Hosting issues in QB can lead to file access issues that can be resolved by reconfiguring the multi-user mode.

  • Open your server PC and access QuickBooks to open the Utilities drop-down menu from the File tab, and select the Host Multi-user Access option to enable the hosting.
  • Next, open QuickBooks on your workstations and check if the Stop Hosting Multi-User Access option is selected; if not, select the Utilities menu from the File tab to select the said option.
  • Lastly, once the server and workstations are configured, rerun QuickBooks to check if the H303 error message code is successfully terminated.


QuickBooks error H303 can be reliably tackled by using the solutions mentioned above. If the error message persists, call us at 1.855.856.0042 to get professional assistance from our QB experts.

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