# Troubleshooting QuickBooks Error H303: A Quick Guide
<p>Are you unable to resolve the <b>QuickBooks Error H303</b>? This frequent error might cause disruptions to the workflow. Easy access to the company files can often be prevented by the <b><a href="https://blog.accountinghelpline.com/quickbooks-desktop-issues/quickbooks-error-h303/">QuickBooks error H303</a></b>. This issue typically arises when a user transitions from single-user to multi-user mode. In this simple post, we'll address error H303 with its causes and, most importantly, show you how to fix it.</p><p></p><blockquote><b>Self-troubleshooting error H303 can be risky and even a threat to financial operations. Consider the consequences: inaccurate financial records, interrupted operations, and time lost on experimentation. Choose a more dependable, safer option instead. Our knowledgeable team at 1.855.738.2784 is available via phone. They'll quickly identify and fix the issue, bringing QuickBooks back into order.</b></blockquote><p></p><h2 style="text-align: left;">What Causes QuickBooks Error Code H303?</h2><div>Often, the multi-user network configuration is the root cause. The following is a summary of the most frequent causes of error H303:</div><div><ul style="text-align: left;"><li>Corrupted QB Component Files: Occasionally, files such as Transaction Log (.TLG) and Network Data (.ND) may cause the issue.</li><li>Network Communication Issues: Another possible cause of the issue could be a malfunctioning network between the workstations and server.</li></ul><div style="text-align: center;"><b><i>Read More: <a href="https://blog.accountinghelpline.com/quickbooks-desktop-issues/quickbooks-error-6073-and-99001/">How do I fix a QuickBooks desktop error 6073?</a></i></b></div><h2 style="text-align: left;">Techniques to Fix the Error Code H303 in QuickBooks</h2></div><div>Now that the causes have been identified let's discuss solutions. Here are two simple solutions that to remove the error H303:</div><h3 style="text-align: left;">First solution: Disable the Host Multi-User Access feature</h3><div>Getting error H303 indicates that QuickBooks is run on one or more workstations. The server is the only computer that has to be set up for multi-user mode. Workstations do not host company files; hence, they need to have the Host Multi-User Access option disabled.</div><div><ol style="text-align: left;"><li>On any system that shows the H303 issue, launch QuickBooks.</li><li>Close the company files. Select File instead, then Utilities.</li><li>If the Host Multi-User Access option displays, do not select it. Move on to the next workstation. It's not this one that's causing the issue.</li><li>If there is a "Stop Hosting Multi-User Access" option, select it.</li><li>Choose utilities by clicking the File menu. It displays the option to Stop Hosting Multi-User Access.</li><li>Repeat the previous steps on each workstation that experiences Error H303.</li></ol><div>Check the workstations before moving on to the server computer. This computer frequently stores the company's files.</div><div><ol style="text-align: left;"><li>The server computer should now launch QuickBooks.</li><li>Choose File, followed by Utilities.</li><li>Select "Host Multi-User Access" if it's available. If the option to Stop Hosting Multi-User Access exists, do not use it.</li></ol><h3 style="text-align: left;">Second Solution: Configure QuickBooks Firewall Ports Manually</h3><div><ol style="text-align: left;"><li>On the screen, click the Start button located in the lower-left corner.</li><li>Look for Windows Firewall and select it.</li><li>Find and choose the Advanced Settings option.</li><li>To add a new rule, locate Inbound Rules in the Advanced Setting and choose it with the right-click menu.</li><li>After choosing Port, click Next.</li><li>Choose TCP and enter the specific ports that correspond to the QuickBooks version you are using:</li></ol><div><ul style="text-align: left;"><li>QuickBooks Desktop 2023: 8091, XXXXX</li><li>QuickBooks Desktop 2022: 8019, XXXXX</li></ul><div> 7. After entering the port numbers, click Next.</div></div></div></div></div><div> 8. Proceed with Allow the connection.</div><div> 9. Click Next once each profile has been marked.</div><div> 10. Name the newly formed Port, such as QBPorts(year).</div><div> 11. Click Finish to complete the setup.</div><div> 12. Repeat the previous steps to create the outbound rules. Continue as before, but select Outbound Rules in step 4.</div><div> 13. After configuring the firewall, restart the computer.</div><div><br /></div><div><b>QuickBooks Error H303</b> can be fixed with the right knowledge and techniques. For best results, follow the given guidelines. Dial the <b>1.855.738.2784</b>, though, if the technicalities mentioned overwhelm you. Our team of experts will assist you through a simple yet advanced resolution for a rapid fix of error H303.</div><div><br /></div><div style="text-align: center;"><b><i>You May Read More: <a href="https://hackmd.io/@j8FBY6gqSte0_3fzMUdK6Q/rJEtaR-ha">How To Resolve QuickBooks Display Issues</a></i></b></div>
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