QuickBooks Error H202 typically occurs when switching to multi-user mode in QuickBooks Desktop. This error disrupts the process of moving from single-user mode to multi-user mode, preventing multiple users from accessing the company file simultaneously.

The primary cause of Error H202 is network-related issues or problems with the QuickBooks Database Server Manager. This error often arises when QuickBooks cannot connect to the company file on the server or when there are issues with the network setup, firewall settings, or host configuration.

To resolve Error H202, start by verifying that the QuickBooks Database Server Manager is installed and running on the server hosting the company file. Ensure that the server is properly configured to host the file and that all necessary ports are open on the firewall. Additionally, check for any updates or patches for QuickBooks that may address compatibility issues.

If the problem persists, consider using the QuickBooks File Doctor tool to diagnose and fix network-related issues. This tool can help identify and resolve connectivity problems that might be causing Error H202. By addressing these issues, you can restore seamless multi-user access to your QuickBooks company file.