How to Fix QuickBooks Error H505 in 2026 (Step-by-Step)

Learn how to fix QuickBooks Error H505 in 2026. Resolve multi-user mode issues easily or call +1-866-513-4656 for expert help. If your QuickBooks company file won’t open in multi-user mode, showing Error Code H505, you’re not alone. This common 2026 error prevents QuickBooks Desktop from connecting to the company file located on another computer. It usually pops up when you try switching to multi-user mode or when the communication between workstation and server breaks. Fix QuickBooks Error H505 in 2026 with this full step-by-step guide. Call +1-866-513-4656 for immediate multi-user mode assistance. Whether you manage payroll, track sales, or reconcile accounts, Error H505 can stop you from working efficiently. But don’t worry—this guide explains exactly how to fix QuickBooks Error H505, why it occurs, and how to prevent it in the future. If you need quick assistance, you can always call our specialists at +1-866-513-4656 for expert help in real time. <h2 id="what-is-quickbooks-error-h505" class="mb-2 mt-4 [.has-inline-images_&]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&]:mt-4">What Is QuickBooks Error H505?</h2> QuickBooks Error H505 appears when the workstation cannot connect to the company file stored on the host computer. It’s one of the “H Series” multi-user errors (including H101, H202, H303, and H505) that indicate network setup or hosting configuration issues. <h2 class="mb-2 mt-4 [.has-inline-images_&]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0">Error Message Example:</h2> <blockquote> “This company file is on another computer, and QuickBooks needs some help connecting.” </blockquote> <h2 id="main-causes-of-quickbooks-error-h505" class="mb-2 mt-4 [.has-inline-images_&]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&]:mt-4">Main Causes of QuickBooks Error H505</h2> Below are the top reasons this error occurs in QuickBooks Desktop or Enterprise versions: <ol class="marker:text-quiet list-decimal"> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Incorrect Hosting Configuration When multiple computers try to host the same company file, QuickBooks may get confused about which system is the true “host.” </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Blocked QuickBooks Database Server Manager (QBDBMgrN) Your Windows firewall or third-party antivirus may block the communication required for multi-user mode. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Damaged or Misconfigured .ND File The Network Data (.ND) file helps QuickBooks access the company file over the network. A damaged or outdated file triggers H-series errors. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Inactive QuickBooks Services If services like QuickBooksDBXX (where XX denotes year version) and QBCFMonitorService are disabled, multi-user connectivity fails. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Incorrect DNS or IP Configuration When the workstation cannot locate the server hosting the QuickBooks file, you’ll face connectivity breakdowns—especially in shared networks. </li> </ol> <h2 id="step-by-step-solutions-to-fix-quickbooks-error-h50" class="mb-2 mt-4 [.has-inline-images_&]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&]:mt-4">Step-by-Step Solutions to Fix QuickBooks Error H505</h2> Follow these steps carefully to fix the problem and restore full connectivity. <h2 class="mb-2 mt-4 [.has-inline-images_&]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0">Step 1: Download and Run QuickBooks Tool Hub (2026 Version)</h2> <ol class="marker:text-quiet list-decimal"> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Close QuickBooks Desktop. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Download and install the latest QuickBooks Tool Hub by Intuit. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Open Tool Hub and select Network Issues tab. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Click QuickBooks Database Server Manager. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Scan the folder where your company file is stored. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Once the scan completes, re-open QuickBooks in multi-user mode. </li> </ol> <h2 class="mb-2 mt-4 [.has-inline-images_&]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0">Step 2: Verify Hosting Settings</h2> On each workstation (not the host system): <ol class="marker:text-quiet list-decimal"> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Open QuickBooks Desktop. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Go to File > Utilities. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> If you see “Host Multi-User Access”, do not click it. This means hosting should be off. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> On the host system, ensure “Stop Hosting Multi-User Access” appears (confirming it’s hosting enabled). </li> </ol> <h2 class="mb-2 mt-4 [.has-inline-images_&]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0">Step 3: Configure Firewall Settings</h2> <ol class="marker:text-quiet list-decimal"> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Press Windows + R, type Control Panel, and hit Enter. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Go to System and Security > Windows Defender Firewall. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Select Allow an app through Windows Firewall. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Add these services: <ul class="marker:text-quiet list-disc"> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> QuickBooksDBXX.exe </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> QBCFMonitorService.exe </li> </ul> </li> </ol> Restart the system once firewall permissions are updated. <h2 class="mb-2 mt-4 [.has-inline-images_&]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0">Step 4: Check QuickBooks Services</h2> <ol class="marker:text-quiet list-decimal"> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Press Windows + R, type services.msc, and hit Enter. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Locate QuickBooksDBXX and QBCFMonitorService. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Ensure both are set to Automatic and in Running status. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> If stopped, right-click each and choose Start. </li> </ol> <h2 class="mb-2 mt-4 [.has-inline-images_&]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0">Step 5: Rename the .ND File</h2> <ol class="marker:text-quiet list-decimal"> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Open the folder containing your company file (e.g., CompanyName.qbw). </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Locate the corresponding .ND file (e.g., CompanyName.qbw.ND). </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Right-click and rename it to CompanyName.qbw.ND.old. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Open QuickBooks and re-scan the folder using Tool Hub’s network tool. </li> </ol> <h2 class="mb-2 mt-4 [.has-inline-images_&]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0">Step 6: Use the Ping Test</h2> <ol class="marker:text-quiet list-decimal"> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Locate the server’s name (on the host system). </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> On the workstation, open Command Prompt and type <code>ping [your server name]</code>. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> If the ping times out, recheck network connection and DNS settings. </li> </ol> If these manual methods feel complex or you need to get back online fast, call +1-866-513-4656 for guided troubleshooting from certified experts. <h2 id="prevention-tips" class="mb-2 mt-4 [.has-inline-images_&]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&]:mt-4">Prevention Tips</h2> <ul class="marker:text-quiet list-disc"> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Keep QuickBooks Desktop and Windows Firewall updated. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Use only one host computer to manage multi-user files. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Regularly scan your company files via QuickBooks Tool Hub. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Add QuickBooks ports (8019, 56728, etc.) to your firewall exceptions list. </li> <li class="py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&>p]:pt-0 [&>p]:mb-2 [&>p]:my-0"> Restart the Database Server Manager after software updates. </li> </ul> <h2 id="frequently-asked-questions-faq" class="mb-2 mt-4 [.has-inline-images_&]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&]:mt-4">Frequently Asked Questions </h2> 1. What is the difference between Error H202 and H505? Error H202 typically occurs when the workstation can’t reach the host computer, while H505 happens when the host settings are misconfigured. 2. Can I fix QuickBooks Error H505 without the Tool Hub? Yes, you can manually adjust hosting settings and firewall rules, but the Tool Hub simplifies the process. 3. Does this error affect QuickBooks Online? No. QuickBooks Online is cloud-based and doesn’t require multi-user configuration; Error H505 affects only Desktop or Enterprise versions. 4. Why does QuickBooks won’t open after updates? This may happen due to unverified Windows permissions or an outdated database service. Restart the system and repair QuickBooks installation if needed. 5. What if QuickBooks Multi-User Mode still won’t work? Verify your network permissions, service configurations, and ND file status. If the problem continues, call experts at +1-866-513-4656 for quick resolution. Fixing QuickBooks Multi-User Error H505 – Full Fix 2026 Guide requires patience, but following the correct steps ensures smooth network access. Once resolved, you can seamlessly switch between single-user and multi-user modes without interruptions—all while keeping your accounting workflow uninterrupted.