QuickBooks Error H202 occurs when QuickBooks Desktop cannot connect with the server hosting the company file in Multi-User Mode. Using QuickBooks File Doctor can help diagnose network connectivity problems, company file issues, and configuration errors. The tool scans the file, checks network settings, and identifies possible causes affecting communication between systems. Updating QuickBooks Tool Hub and reviewing hosting settings may also help resolve H202 problems. For assistance with QuickBooks Error H202 and network issues, call +1(866) 513-4656.