At some point, you may need to share your company files with other employees so they can access them if required. Here, the QuickBooks multi-user mode feature plays a crucial role by letting you share the company files over the network. However, there are situations when you might encounter QuickBooks error H303 while switching QB to multi-user access. The reasons that can be responsible for it are damaged .ND file, Windows restrictive firewall settings, conflict with the DNS server, and many more. As a result, QuickBooks cannot communicate with the company file.

But don't worry, we have brought you some solutions in this blog to get rid of the problem. Deep dive into the page and explore the information carefully.

Resolving the QuickBooks error H303 can be tough if you try to do it alone; instead, contact a professional and ask experts to help you. Dial 1.855.738.2784 to connect with our certified QB Pro Advisor. 

Main Contributors to the QB Error H303

The following are some reasons that might be causing error H303 and preventing you from switching to multi-user mode.

  1. The primary reason that might lead to such an issue is the damage.ND file.
  2. It can be due to a malfunction of essential services such as QuickBooksDBXX or QBCFMonitorService.
  3. This can be due to a conflict with the DNS server.
  4. One reason that can cause it is the Windows antivirus firewall software.
  5. QB is unable to get the IP address of the server computer.

Steps To Execute When Stuck With QuickBooks Error H303

Here are some ways to eliminate QB error code H303. Let me show you how to implement them:

Solution 1: QB Database Server Manager on your server

  1. Open the QB Tool Hub.
  2. Choose Network Issues.
  3. Click on QuickBooks Database Server Manager, and if you don't have QB installed on your server, it will ask you to install it.
  4. Now, choose Start Scan in the Server Manager if you can find your company file.
  5. If not, tap Browse and go to the location of the company file and then choose Start Scan.
  6. After the scan finishes, choose Close.
  7. Open QB on the workstations where the error H303 has occurred.
  8. Next, choose File and then Switch to Multi-user Mode.
  9. If you are on the server, you must do it there, too.

Solution 2: Run QB File Doctor

  1. Open the QB Tool Hub.
  2. Choose Company File Issues.
  3. Click on Run QuickBooks File Doctor, which might take up to a minute to open.
  4. If it fails to open up, search for QuickBooks Desktop File Doc and open it manually.
  5. Now, you need to hover over the company file dropdown and choose your company file.
  6. If you don't get your file here, choose Browse and search for it.
  7. Click on the Check your Network option.
  8. Tap Continue.
  9. Enter QB admin password.
  10. Tap Next.

The Bottom Line 

To make an outline of the blog, QuickBooks error H303 is a multi-user mode issue that is not rare to experience. We have discussed the factors that may cause it have been precisely listed in the section above, along with the solutions to fix it. If you are still stuck and need help, dial 1.855.738.2784 to talk to an expert.

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