You may come across several issues while attempting to switch to multi-user mode. In this blog, we will talk about QuickBooks error code H303, which majorly appears on the screen when trying to use QB in multi-user mode. The main factors that can lead to such a problem are insufficient Windows access permissions, malfunctioning QBCFMonitorService, Damaged system files, and many more. Additionally, it takes place when you have not properly configured multi-user hosting settings.


But you don't have to worry, as we have come up with a section, including practical solutions to rectify this issue. Delve deep into the page and start implementing the methods accordingly.


However, we advise you to consult a professional and get the QB error H303 fixed by them. Dial 1-855-888-3080 and get instantly in touch with them.

Main Contributors to the QB Error H303

A number of factors can be considered to cause QuickBooks error H303. To help you better understand the problem, we have outlined some of them.

  • It can occur due to improper multi-user hosting settings.
  • One major reason can be insufficient Windows access permissions that prevent QB from sharing company files over the network.
  • This may also happen if you are running an outdated QuickBooks application.
  • Damaged system files can also cause the issue.
  • If QB services like QBCFMonitorService are malfunctioning.

Practical Fixes That Work for QuickBooks Error Code H303

Consider the following solutions that have helped many users rectify error H303. Let’s see what the methods ask you to perform:

Solution 1: Run QuickBooks Database Server Manager on your server

  • Open the QB Tool Hub.
  • Choose Network Issues.
  • Tap on QuickBooks Database Server Manager. In case you have not installed the QB application, it will ask you to download it first.
  • If you already have the QB software, move further.
  • In the Database Server Manager, if you can see your company file, select Start Scan.
  • If you fail to locate your company file, browse to the location of the company file, and then choose Start Scan.
  • When the scan is finished, choose Close.
  • Now you need to open QB on all the workstations where the error has occurred.
  • Next, choose File.
  • Switch to Multi-user Mode.
  • After this, you are also required to check your server computer if you use it as a workstation.

Recommended to read: How To Solve QuickBooks Error 15240 ?

Solution 2: Run QB File Doctor

  • Open the QB Tool Hub.
  • Choose Company File Issues.
  • Tap on Run QuickBooks File Doctor, and it will take a moment to open.
  • Note: If you can’t open this utility, search for QuickBooks File Doc and open it manually.
  • Now, hover over the company file dropdown.
  • Choose your company file that you are willing to repair.
  • In case the file is not visible, tap on Browse and search to get it.
  • Tap on the option saying Check your file.
  • Choose Continue.
  • Enter QB admin credentials and then choose Next.

In a Nutshell

To briefly summarize the overall page, we can say that QuickBooks error code H303 is a related issue. A variety of reasons can be responsible for triggering it, and some of them are precisely mentioned in the above section. Along with this, you are also provided with solutions. If you are still having issues resolving the error, don't hesitate to consult a professional at 1-855-888-3080.

You may also read: Different Solutions for QuickBooks Payroll Error 15241