How to Fix QuickBooks Error H303?

If you are getting the QuickBooks Error Code H303 then it indicates that your solution company files need extra configuration. The main cause behind the H101, H303, and H505 is the additional requirements of installation and setup while you are accessing the company file from the different locations on the different systems.

Why Does the QuickBooks H303 Error Occurs?

The H303 problem is generally caused by the software failing to make a connection with the server when a user attempts to connect to a company file.

Reasons for Occurring QuickBooks H303 Error?

  • Damaged or wrong.ND file.
  • The solution cannot access company files located on a server or via a system IP address.
  • The QuickBooks Database Server Manager Services or QBCF Monitor are not starting.
  • Incorrect hosting configuration settings. 
  • Communication with the company files is being blocked by a firewall.
  • Inaccurate computer network

How to Troubleshoot QuickBooks H303 Error?

Solution 1: Verify your QuickBooks Hosting Settings

  • Open QuickBooks in the mode for multiple users.
  • On both systems, select the File, and then select Utilities.
  • Select the option to Stop Hosting Multiple Users.
  • Navigate to Files, Utilities, and then on one of the PCs, turn on hosting.
  • Restart the QuickBooks software on both of the PCs.

Solution 2: Move the QuickBooks Folder to Another Location

  • You have to make a new folder on your hosting computer.
  • To share your company files, specify the Windows access rights and share them.
  • In the new folder, create a copy of the.qbw file.
  • Start the multi-user mode for your company files.

Solution 3: Recreate Firewall Settings

  • Select the Control Panel after turning on the system.
  • Navigate to Firewall Settings and select the option to Grant Program Access via Firewall.
  • Click “Add Program.”
  • To the exception list you have to add QuickBooks 20xx.
  • To ensure that the modifications are implemented correctly, restart your computer.

Also Read: QuickBooks Connection Diagnostic Tool


Resolving QuickBooks Error H303 involves several steps to ensure seamless connectivity and functionality within the QuickBooks application. By systematically addressing the root causes—such as misconfigured hosting settings, incorrect firewall configurations, and issues with QuickBooks services—you can effectively troubleshoot and rectify the error. If the error persists despite these efforts, consulting with a QuickBooks professional or reaching out to QuickBooks assistance may be necessary to address more complex issues.

Frequently Asked Questions (FAQs):

Q1. What is QuickBooks Error H303?

Ans. The QuickBooks Error H303 indicates that more configuration is required for the computer hosting the QuickBooks company file. This error appears when network problems or improper hosting settings prevent QuickBooks from accessing the company file that is on a different computer. 

Q2. What causes QuickBooks Error H303?

Ans. Common causes include DNS configuration problems, improper QuickBooks services operation on the host computer, improper hosting configuration, and firewall-blocked connection.

Q3. How can I verify hosting settings to fix Error H303?

Ans. Make sure host mode is selected on the computer hosting the company file:

  • QuickBooks should be opened on the host PC.
  • Select Utilities from File.
  • Make sure to choose Host Multi-User Access”. It indicates that hosting is already enabled if “Stop Hosting Multi-User Access” is an option. 

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