QuickBooks Error H202 occurs when a user attempts to switch to multi-user mode, but the server computer hosting the company file is unable to communicate. To fix it, start by ensuring the hosting settings are correct on all workstations and the server. Verify the QuickBooks Database Server Manager is running on the server and use the QuickBooks File Doctor to diagnose and repair network issues. Configure firewall and security settings to allow QuickBooks communication. If these steps do not resolve the error, add the server to the Windows hosts file. Following these measures can typically restore multi-user access in QuickBooks.
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