Learn How To Fix QuickBooks Error H303
                     Troubleshooting Tips For 
QuickBooks Error H303
QuickBooks is a top-grade bookkeeping software that precisely handles the business 
accounting of its users. The software also provides the convenience of sharing financial data 
between multiple users. Unfortunately, internal issues can sometimes affect the multi-user 
network established by the software. QuickBooks Error H303 prevents the user from 
hosting their company file due to incorrect settings. In case you also get troubled by this 
error in your QuickBooks, keep reading this blog further to review its causes and the 
techniques to resolve it.
Get this issue quickly fixed by QB professionals by reaching them at 1-855-856-0042.

Reasons
You’ll encounter this hosting error in QuickBooks due to the following reasons-
• The company file you try to open is already in use by another user in single-user 
mode, or the workstations are running in multi-user mode.
• The company file got struck with a virus attack or data corruption on your system and 
has turned into an unreadable format.
• Database Server Manager fails to run the .TLG or .ND file.
Solutions
You can take help of the following methods to counter this QuickBooks error on your 
computer-
Solution 1- Set up QB hosting settings
When you use the multi-user network in QuickBooks, only the server computer should be 
the one hosting the file in multi-user mode. If any workstation is switched to multi-user 
mode, the software will encounter this error instantly, and you won’t be able to access the 
company file. You need to configure the QuickBooks hosting settings as shown in the 
steps below-
• Open QuickBooks on your server computer and click File.
• Tap Utilities in the drop-down list and select Host multi-user access.
• Go to all the workstations individually and click on the File menu in QuickBooks.
• Select the Utilities option and click Stop Hosting multi-user access.
• Reboot all the systems.
• Open QuickBooks on your server computer and run the company file in multi-user 
mode.
• Reopen QuickBooks on all the workstations and access the company file.
If the error appears again while accessing the company file, try the next solution.
Solution 2- Mend the company file using QB Tool hub
The software can also develop this error while processing the company file if the file exists in 
an unsupported format due to damage. You need to fix the company file to make it usable 
for the software again. Go to the QuickBooks website and download the most recent version 
of the QB tool hub. Install the QuickBooksToolhub.exe file and use the steps given below-
• Launch the QB tool hub after installing it and click on the Company file issues.
• Select Run QuickBooks File Doctor tool from the options.
• Tap Browse and locate the company file on your system.
• Select the Check your file option and enter your admin password to begin the tool.
• Let the file get repaired completely and re-access it in QuickBooks.
After using the methods, you won’t face any issues opening or hosting the company file.
Conclusion
This blog provides everything you need to know about QuickBooks Error H303. The 
causes of this error are mentioned, and the methods to terminate it are also discussed in 
detail. We hope the blog helped you in making your QuickBooks trouble-free again.
Contact a QB support representative at 1-855-856-0042 if you have any remaining doubts 
about this error.