How to Fix QuickBooks Error H303 Problem with Multi User

QuickBooks Error h303

QuickBooks is one of the most widely used accounting tools for small and medium firms due to its effectiveness and efficiency. However, it is crucial to note that, at times, users face some errors in its usage such as the QuickBooks Error H303. This error usually happens when the system that has the company file needs further configurations, which prevents the file from being accessed through other workstations involved. The primary causes may include a misconfiguration of the Domain Name System, incorrect IP address configuration, or firewalls. It is important to identify and address these problems to ensure continuous business flow. This article is particularly helpful for users who are faced with QuickBooks Error H303 since it offers detailed step-by-step instructions on how to solve the problem and get back to work as early as possible.

What is QuickBooks Error H303?

This issue may occur when the user wants to get the data or company files on any other computer. That computer does not have a proper establishment or setup and also requires some more setup installation. It looks like this:

Error code: H303

QuickBooks Error H303

QuickBooks Error H303 usually means that the workstation needs some additional configuration on which the company file is being stored. So whenever these workstations are unable to access the vital file, this error H303 appears. 

What Causes QuickBooks Error H303?

This problem arises when the user is not capable of opening the company file. A few major reasons are mentioned below:

  • DNS server: Somehow DNS server settings are not configured correctly.
  • IP Address: The error may occur when the server’s or Host’s IP address is not configured or not available to each other.
  • Hosting: The configuration of the hosting is misconfigured or not correct.
  • Firewall Software: Sometimes firewall blocks the exchange of outgoing and incoming data. 
  • .ND file: ND means network data file. It may be damaged or corrupted.
  • Hosting: Sometimes QB does not acquire the file of the company while hosting through the server.

QuickBooks Error H303

What are the symptoms of Error H303 in QuickBooks?

This H303 is a common error and may disclose itself when you see these mentioned signs or symptoms:

  • The software may freeze or slow down. 
  • Users will not be able to start multiple-user settings.
  • You will be unable to open the company’s file on another computer.
  • The error code of H303 will appear on the desktop.

How to Fix QuickBooks Error H303?

There are many convenient or easy ways mentioned below that help users resolve this Error H303. Before Choosing and starting the process, you should do a backup of the QWB file so that when you start the software again you will get the original data. Please consider the following methods:

Method 1: Create a new folder for a new company file

  • Create a new folder on the system. Now have permission to exchange the files. 
  • Now copy the original company file.
  • In the newly created folder, paste the file in “Multi-User” mode.
  • Now open that file in the QB and check for the error.

Method 2: Use the QuickBooks File Doctor Tool

Open the “QB File Doctor” tool to have a solution to network-related problems. It will help to remove blockage on multi-user connections. You can also fix the company file with this tool. If you are not able to fix this problem after applying this solution, then move to method 3. 

QuickBooks File Doctor Tool

Method 3: Correct Firewall Settings

A firewall can resist data transfer and it may quarantine some important files. It may block the server computer of QuickBooks. After completing of correct settings in the Firewall, try to open QuickBooks on a workstation that is showing an H303 error. The steps are listed below: 

  1. Consider the Firewall settings; hit the “Windows” option.
  2. Visit the “Instrumental” panel.
  3. There, type “Firewall” in the search bar and hit “Enter”.
  4. Press “Enter”.  Then the “Advanced Settings” option.
  5. Opt for “Outbound Rules” and go for “New Rule”.
  6. Select “Ports” and click “Next”.
  7. Consider the following ports by clicking TPC:
  8. Hit “Next” and tap on the “Allow the Connection” option.
  9. Now in the field, add your name.
  10. The process is finished; now try to open the QuickBooks.

Note: If this H303 persists, then follow the next method.

Method 4: Look at the hosting and services of QuickBooks

  • Verify QuickBooks Services:
    1. Firstly Press the “Windows key + R”, the “Run” window will pop pop-ups. 
    2. On the “Run” window, type “MSC” and hit “Enter”.
    3. Now search for “Services.msc”  in the search bar.
    4. Now scroll up and down in search for the “QuickBooksDBXX” in the service window.
    5. Now “Double Tap” on the QB “DBXX service”. Ensure that the startup kind is automatic and go for repair if “Standing” is started or already running. 
    6. After completion of the above-mentioned steps click on the “Recovery” tab. (If you see a failure while doing these steps, then restart the “DBXX” services.
    7. Now go for “QBCFMonitor” services. (Follow previous 1-6 steps). 
    8. Now open QB in the “Multi-User” mode and check whether the error is resolved or not.
  • Verify hosting:
    1. On every system, open QB.
    2. Now open “Utilities” by selecting the files.
    3. If the Host accesses the “Multi-User” on the list, then the system is not accessing/hosting the file of the company.
    4. Don’t change anything when you see that in the workstation, the host accesses the “Multi-User”.
    5. Whenever the ‘‘Stop Hosting the Multi-user Access’’ option appears on the screen then select that option.
    6. Repeat all the 1-3 steps on every computer.

Method 5: Check settings of the QuickBooks

If this error is not resolved by using the previous 4 methods, try this 5th one. You have to change some settings in the accounting software QuickBooks.  The steps are mentioned here:

  • Firstly opt for “Multi-User” mode and open QuickBooks.
  • Now follow the path:
    • Files >>> Utilities >>> Stop Hosting Multi-User Configuration
Stop Hosting Multi-User Configuration
  • Now turn on hosting on any workstation and visit the following path:
    • Utilities >>>> Host Multi-User Configuration
Host Multi-User Configuration

Final Words

Fixing the QuickBooks Error H303 involves several steps, starting with the setting up of the firewall, and the status of hosting and services. However, these solutions are usually unproblematic, though users may occasionally experience some problems. If you are still facing problems or it is more tough to follow the instructions, please do not hesitate to consult with our QuickBooks specialists around the clock. You can start an instant text chat with a helpful representative at any time. As highlighted in the article, by implementing the mentioned measures together with consulting a specialist in case of need, you can solve H303 QuickBooks Error effectively and without delay for your accounting software to operate efficiently. Please feel free to ask any queries or leave any comments in the comment section below, and we’ll be glad to get back to you.

See also – Fix QuickBooks Error Code H202 [When Switching Multi-user]


Q. Is it safe to delete ? ND files to fix QuickBooks Error H303?

Yes, it is safe to delete. ND files as QuickBooks will automatically create them when you reopen the company file and may fix the error.

Q. Is QuickBooks Error H303 related to multi-user mode?

Yes, QuickBooks Error H303 is Multi-user related and means that the workstation has to be configured further to access the company file.

Q. What is the difference between QuickBooks Error H303 and H505?

Error H303 is a problem peculiar to a particular workstation while Error H505 means that the server where the company file is hosted is configured for multi-user mode.

Q. How do I use the QuickBooks Database Server Manager to fix Error H303?

To start using QuickBooks Database Server Manager, one will have to open it from the Start menu; scan the folders containing the company files and then make sure that the network configuration is correct and the connection is not getting interrupted and then find the solution for Error H303.

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