QuickBooks Error H303 is typically a company file-related issue that is primarily caused due to erroneous settings while using QuickBooks in the multi-user mode.

What are the different H series errors in QuickBooks and their causes?

The different varieties of the H series of errors include H505, H101, and H202, among others. These are usually instigated by network-related issues, network file errors, or misconfiguration of multi-user settings, including other network-related causes.

Does this QuickBooks Error H505 necessarily imply Company file-related issues?

No. Apart from a company file-related issue, Error H303 in QuickBooks can also be caused due to impedance caused by a Firewall, erroneous multi-user configuration, some network file-related issue, network/poor internet connectivity, including a plethora of other diverse causes.

You might also see: How to Troubleshoot QuickBooks Error 6073 and 99001?

Methods to Fix the QuickBooks Error Code H303

The steps to resolve Error H303 are as under:

  1. Setting up the File Doctor
  2. Configuring Multi-user settings
  3. Bypass QuickBooks over the Firewall
  4. Transfer the company files to another folder

Method (1): Setting up the File Doctor

QuickBooks file doctor in tool hub - Screenshot Image 1
  • Install the tool and use it to scan for company file and network-related issues.
  • If the tool diagnoses any aberrations/ errors, it will automatically get them resolved.

Method (2): Configuring Multi-user settings

  • After opening QuickBooks in the multi-user mode on multiple systems, head to File and then Utilities.
  • Within Utilities, pick the option for stopping multi-user hosting.
  • Now, Enable multi-user hosting on one specific system. Just head to File, Utilities, and then choose the option for hosting Multi-user configuration.
Host multi-user access - Screenshot Image

See it Also: How to Resolve QuickBooks Error 6129?

Method (3): Bypass QuickBooks over the Firewall

  • Search for Firewall in the Windows search bar and then open Windows Firewall.
  • Head to advanced settings and hit the right mouse click on Inbound rules.
Create a new rule in firewall settings - Screenshot Image
  • Choose a new rule and add the following ports:

8019: For QuickBooks 2020 and QuickBooks 2019.

8019, 56728, 55378-55382: For QuickBooks 2018

8019, 56728, 55378-55377: For QuickBooks 2017 version.

  • Now, tap on Allow connection.
Allow the connection - Screenshot Image
  • Click on Next.
  • Choose a new rule and then name it. Click on Finish.
  • The same procedure is to be followed for Outbound rules.

Method (4): Transfer the company files to another folder

  • Right-mouse click on the QuickBooks Desktop icon.
  • Click on Properties.
  • Choose Open File location.
  • Search for the company file(s) and copy the same using Ctrl + C short key command.
  • Paste the File (s) to a New folder on the Desktop.
  • Open QuickBooks and access the company file from this newly created folder on the Desktop.

Method (5): Rename .ND file

Rename the .nd files and the .tlg files - Image
  • Head to the QuickBooks folder and search for the File having .ND extension.
  • Rename this File.
  • Add .old at the culmination of the filename.

How can I locate the server host system through QuickBooks?

  • Launch QuickBooks to proceed to the File menu.
  • Visit Utilities in the File menu.
Stop Hosting Multi-User Access - Screenshot Image
  • If the Stop Multi-user Hosting option appears, it infers that that particular system is the host server.

Read Also: How to Fix QuickBooks Error Code 80070057?

While the H series errors, especially QuickBooks error code H303 can have a pernicious impact on your QuickBooks operations, if you abide by the correct measures for their resolution, then these errors can be pretty easily dealt with.


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