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Have you recently tried to open your Company File but could not access it? Did you then get the QuickBooks error H303? No worries; there are solutions available to get you rid of the error. A different hosting mode is the usual cause of the QuickBooks Error. It needs to be switched to fix the issue. Are you wondering how to go about fixing this error? Read the whole blog as it contains the causes and solutions using which you can overcome error code H303.

You may find it difficult to rectify the error; dial +18557380359 to get the issue resolved with expert assistance

Common Reasons Behind Encounter of Error H303 in QB

For fixing anything, knowing the root cause is essential; follow the list below for reasons that are throwing QB error code H303:

  • Hosting issues that are giving you an indication of the wrong hosting selected for accessing QuickBooks Company File.
  • Windows firewall settings are not appropriate, hence creating troubles for your QuickBooks.

Also Read: Quick Ways to Resolve QuickBooks Error H101

Troubleshooting Methods to Get QB Desktop Error H303 Fixed

Here are methods to resolve QuickBooks error code H303:

Method 1: Fix The Hosting Mode Issue That’s Not Letting You Access The Company File

  • Set the server computer to be multi-user mode. Error H303 can be triggered if more than one computer uses the multi-user mode. This is why you need the multi-user mode settings configured on all other workstation computers.
  • For this, you need to click on File tab>Utilities>Switch to multi-user in the server computer. 

Method 2: Verify and Rectify File name (.TLG and .ND)

  • Search for the Company file with extension .TLG and .ND
  • Then click it and see if there are any extra spaces or characters there; remove them.

It is the method mentioned above that helps them move to the next fix in line.

Method 3: Configure the Firewall Settings

  • How is Windows firewall hindering you from accessing QuickBooks Company File? It is because the Windows firewall is scanning the QuickBooks necessary file to run the program and treating it as a threat. 
  • You need to go to the settings of the Firewall and make the QuickBooks file as an exception. It will exempt the QB file from getting scanned, and you can access the QuickBooks without interruption from the Firewall. 

You can also try the automatic fix from the Intuit site to repair company file common issues. Also, make sure that you have logged in as an administrator in QuickBooks. If not, then right-click on QuickBooks, and you can easily get the option to Run as administrator. Click on it; this will sign you in as admin.


Still not able to get over the error even after trying the above methods? You need advance help at this stage. It means a professional requires a thorough check to identify the issue and, after that, guide you for solutions. Dial +18557380359 for assistance from our QB-certified team of experts for QuickBooks error H303.


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