Users often encounter QuickBooks Error H202 while accessing a company file stored on another system. The main cause includes incorrect network setup, firewall blocks, or stopped Database Server Manager services. To fix this problem, set up QuickBooks hosting correctly on the server, verify network connectivity, and reconfigure Windows firewall ports. Checking that QBCFMonitorService is running can also resolve the connection fault. Keeping QuickBooks Desktop updated ensures better file synchronization. If issues persist while switching to multi-user mode, reach technicians at +1-866-408-0444 to restore flawless network performance across your QuickBooks environment.