QuickBooks Error H303 arises when the company file needs further setup. Generally, this error occurs when the firewall blocks the communication between the company file and the workstation or server computer. When this error occurs in your QuickBooks software you see a pop-up message on your computer screen. This error belongs to the H series error, most of the H series errors are resolved when you run the QuickBooks file doctor and scan the file. 

In this blog post you can explore the main cause of this error and how to solve it with ease and quickly maintain your productivity without any disruption in your workflow.

What is Error H303?

Error H 303 is a company file error. When multi-user mode is misconfigured so this can trigger this error. QuickBooks Software allows multiple users to work at the same time on a company file. When this error occurs in your software, it will disrupt your workflow. 

Cause of QuickBooks Error H303

When your QuickBooks software attempts to connect with the company file, it fails to establish a connection with the server. By this misconfiguration user experienced the QuickBooks error H303. Here we can write some causes below:

• If the .ND file is incorrect or damaged.

• When your hosting setup is misleading and incorrect. 

• When your network is not working properly. 

• When the firewall has blocked all communication operations. 

• When the user is disable to open the company file by which server and IP address are hosted.

• When you can not share the company files.

• If your QuickBooks database manager and QBCF Monitor service are crashing when you are starting them.

• If the user is unable to retrieve the file from the server.

Symptoms of QuickBooks Error H303

• You can not enable the operating system to open on the pc.

• The most prominent symptom is that your computer screen shows a message that contains “Error Code H303; This company file is on another computer, and QuickBooks needs some help connecting.”.

• Your system might freeze and work slowly.

• You can not use the multi-user setting.

• You can not open QuickBooks files and are facing some issues when it's open. 

How to fix QuickBooks Error H303?

Some of the most prominent methods for resolving this error are listed below:

Method 1: Install the QuickBooks File Doctor Tool

• To start this method, close the QuickBooks software properly.

• After this, install and download the latest version of QuickBooks Tool Hub on your system.

• When you install the tool hub, follow all the instructions that are shown on your screen to install smoothly.

• Open the tool hub when it is installed on your system.

• Click on the company file issue option.

• Ensure that QuickBooks is installed on your server with the proper configuration.

• After this, run the QuickBooks file doctor to scan the company file.

• This tool is capable of automatically recognizing and correcting the mistake.

• After this whole process, close the tool hub and QuickBooks and restart them.

• And issue will be removed in your QB company file.

Method 2: Check the QuickBooks Hosting Setup

• Firstly, open the multi-user mode in QuickBooks.

• Next, you must select the chosen folder.

• Click on the file option and go to the utilities, and after mark the stop hosting multi-user configuration.

• After this tab the start hosting from your system.

• Next, access the utilities and enable the multi-user hosting configuration.

• At the end of this method, you need to reboot your system with the new configuration settings.

Method 3: Authenticate Your Firewall with New Settings

At the start, open the window on your computer. 

Go to the control panel. 

Click on the firewall authentication setting.

Then click on the “Allow a program through the firewall”.

After this go to the exception list and select “Add Program” and then “Add QuickBooks 20xx”.

Last of this method, when this process is completed, restart your computer and open QuickBooks.

Conclusion

In conclusion, the above blog has some methods that help to resolve the H303 error and some reasons that are responsible for the occurrence of this error. If you read this blog carefully, ensure that you can resolve this error quickly and easily.