QuickBooks Error H202 usually occurs when QuickBooks is unable to connect to the company file stored on another computer or server. This error is typically caused by network issues, firewall restrictions, or incorrect settings in your multi-user environment. To resolve Error H202, first, ensure all systems are connected to the network and QuickBooks is configured correctly. You may need to disable firewalls or run the QuickBooks Database Server Manager. For persistent issues, call +1-855-510-6513 for expert support and quick troubleshooting.