QuickBooks Error H303 pops up when the user tries to access the company file stored on another system, and the system requires some additional configuration. If you get QuickBooks multi-user mode error H303 while trying to switch to multi-user mode, it means something is blocking the multi-user connection to the server.

1. What is QuickBooks Error H303 and How to
Resolve it?
QuickBooks Error H303 pops up when the user
tries to access the company file stored on
another system, and the system requires some
additional configuration. If you get QuickBooks
multi-user mode error H303 while trying to switch
to multi-user mode, it means something is
blocking the multi-user connection to the server.
If you are facing any difficulty in resolving
QuickBooks Error H303, you can talk to our
team of experts by calling on our helpline
number (1.855.738.2784) to get assistance to
sort out the error

2. What triggers QuickBooks Error H303?
• QuickBooks company file error H303 arises when the
user is not able to access the company file. We have
listed some of the elements that trigger the error.
• There is damage in the .ND file of the QuickBooks.
• Due to incorrect host configuration settings.
• The system’s firewall has blocked the communication
of the QuickBooks with the company file.
• Troubleshooting techniques to Fix
QuickBooks Multi-User Mode Error H303
• There are many convenient methods that can
fix QuickBooks Multi-User Mode. We have
listed them below:

3. Method 1. Run QuickBooks Database Server
Manager on your server system
• QuickBooks Database Server Manager lets users share the
company file with other systems over the same network. It
helps to monitor the multi-user network. Before following the
steps to run database server manager, ensure you have
QuickBooks Tool Hub installed on your system:
• Open QuickBooks Tool Hub and select Network Issues.
• Now Open QuickBooks Database Server Manager.
• If you can see your company file path under the Browse, click
Start Scan.
• If you don’t find the company file; Browse to locate the
company file and then click on Start Scan.
• QuickBooks Database Server Manager will fix the firewall
permissions.
• Click on the Close button after the scan finishes.
• Open QuickBooks on each computer where you get
QuickBooks multi-user mode error H303.

4. • If your workstation can go into
multi-user mode without showing
any error, then the issue is fixed.
If you still get the error, you need
to contact certified QuickBooks
experts to resolve the
QuickBooks Error H303 by
dialing (1.855.738.2784).