How to Resolve QuickBooks Error Code H303?

When attempting to locate company files on the system, QuickBooks Error H303 implies the need for additional settings. By interfering with their work, it may irritate a user. Let’s go over what it is, why it arises, and simple solutions in depth.


A Brief Review of QuickBooks Error H303

The H series of issues include the often occurring bug known as QuickBooks Error H303. They are brought on by a multi-user network misconfiguration. This error is further explained by the supporting words that go along with it: “This company file is on another computer, and QuickBooks needs some help connecting.”


The user may experience the QuickBooks H303 issue in the following scenarios: 


  • The company file is stored on a different device than the server. 
  • A missing configuration prevents access to the current file.


Signs and Symptoms of QuickBooks Error H303

The multi-user configuration of your entire network may have a number of issues, which could finally result in QuickBooks Error H303. Yet here are a few of the most frequently cited causes of the same: 

  • The main reason for error H303 in QuickBooks is improper hosting settings. 
  • The Network Data (.ND) file as well as the Transaction Log (.TLG) file, two QB component files that might become damaged or corrupt, maybe the issue. 
  • The H303 error may appear if QB is unable to obtain the IP address of the server computer. 
  • Other causes of this problem include inactive QuickBooks Database Server Manager or QBCF Services
  • The error may appear as a result of a system firewall interruption. 
  • The issue could also be caused by a malfunctioning network link between the server and the workstations.


Methods To Fix QuickBooks Desktop Error H303

The following discussion covers all potential solutions to get rid of QuickBooks Error Message H303. Take the advice of the support staff to prevent any misconfiguration or follow the instructions to fix the error:


Method 1: Installing and Utilizing the QuickBooks Tool Hub on the Server 

The QuickBooks Tools Hub assists in resolving some of the frequent issues that users may experience when utilizing the software. To download the QuickBooks Tool hub and finally use it to fix QuickBooks Error Code H303, follow the procedures listed below:



  • Install the QuickBooks Tools Hub while QuickBooks is closed. 
  • To install it, run the QuickBooksToolsHub.exe file and adhere to the on-screen directions. 
  • Double-click the QuickBooks Tools Hub desktop icon after the installation is finished. If it’s not on the Desktop, try searching for it using the Windows Start button. 
  • The QuickBooks Database Server Manager must then be launched on your server. 
  • Choose Network Issues from the QuickBooks Tools Hub’s menu that appears. 
  • You should select QuickBooks Database Server Manager. You must select Start Scan. 
  • Any permissions problems with the firewall are automatically fixed by QuickBooks Database Server Managers. 
  • After the scan is finished, click Close
  • Open QuickBooks on each workstation and check to see if the Error code H303 is fixed. Furthermore, choose Switch to Multi-user Mode from the File menu to resolve the problem.


Method 2: Repair QuickBooks Desktop Error H303 by Downloading and Running QuickBooks File Doctor 

QuickBooks File Doctor helps to resolve error H303 and others by addressing the actual causes in the company file and network settings. 


  • Choose Company File Issues from the QuickBooks Tools Hub
  • In QuickBooks File Doctor, click Run.


  • The company file should be chosen from the drop-down menu whenever the QuickBooks File Doctor opens. To locate the file, you have two options: browse and search. 
  • Choose Check your file (just the middle option), then click Proceed. 
  • Choose Next after entering your QuickBooks admin password. 

Method 3: Verify the Services on the Server Again

Running the services on your host computer is essential. Follow the procedures below to verify for QuickBooksDBXX and QBCFMonitorService:

  • Type “Run” and press the Enter key on the Windows Start menu. 
  • Type msc into the Run window. 
  • Double-click QuickBooksDBXX after conducting a search for it. 
  • Choose Automatic for the Starting Type. 
  • Make that the service is running or has already started. Choose Start if not.
  • Restart the Service by selecting it from the drop-down menu after clicking the Recover tab. First failure, Second failure, and Following failures are the options available from the three-down choices. 
  • Click Apply, then OK


From Windows 8 Onwards: 

  • Press the Windows and R buttons on your keyboard to bring up the Run command box. 
  • Enter Services.msc in the newly created window. 
  • Type Services.msc into the search box that appears. Search for QuickBooksDBXX by navigating up and down the list. 
  • In the event that the standing mode is already active, double-click the QBDBXX service. It will automatically result in the fix. 
  • If any problems arise after completing these procedures, locate and choose QBFCMonitor services under the Recovery menu.
  • After finishing, launch QuickBooks on each computer. Following that, choose Switch to Multi-user Mode from the File menu, and if it does, the problem won’t recur.


Method 4: On Your Server, Add Services to the Windows Admin Group

  • Do right-click on the folder that contains the company file. 
  • Click Edit under Security after choosing Properties
  • Click Allow to provide QBDataServiceUserXX Full Control
  • Following applying, click OK. 

Windows Access Privileges Should be Set to Share Company Files in Order to Further Prevent Issues 

  • Use Windows + E to launch File Explorer
  • Simply do right-click on the Company File folder. 
  • After selecting Sharing from the Properties menu, click Share Add
  • Set the access level to Full Control for the QBDataServiceUserXX that corresponds to your version. 
  • Lastly, select Share.


We hope that one of the techniques listed above helped you fix QuickBooks Error H303. Despite being feasible, you would have been confused by the complexity of the many approaches. Contact the error support staff at +1-800-615-2347 in this circumstance.

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