QuickBooks Error H303

[WilliamJack]

I'm currently grappling with QuickBooks error h303 and need some help. This error typically indicates issues with accessing the company file from another computer on the network. Here’s what I have tried and am looking for further suggestions:
Check Hosting Configuration: Ensure that one computer (ideally the server) is set as the host for the QuickBooks files.
Use QuickBooks File Doctor: Download and run the QuickBooks File Doctor to diagnose and potentially resolve network or company file issues.
Configure Firewall: Modify firewall settings to allow QuickBooks error h303 through and ensure it’s not blocking necessary QuickBooks communications.
Verify QuickBooks Services: Make sure that the QuickBooksDBXX and QBCFMonitor services are running.

Read Also: QuickBooks tool hub

Network Data File: Check the Network Data (.ND) file. A damaged.ND file might cause this error, so consider recreating it.