QuickBooks error H202 is an error that pops up when a user tries to use QuickBooks in multi-user mode. This error implies that the multi-user connection to the server is blocked. QuickBooks error code H202 message states that the company file is on another computer and QB needs some help connecting. When this error occurs, a QB user fails to open a company file located on another computer. Why does QuickBooks Error H202 occur? Error H505 occurs when QuickBooks Desktop is unable to communicate with the server. The reasons that cause this error are listed here below – Hosting settings are misconfigured. Exchange of data between QuickBooks and server is being blocked by the firewall software. DNS settings are not properly configured. Host’s or server’s IP address is not available to QuickBooks Desktop. These QuickBooks services are not running – QBCFMonitor or QuickBooksDBXX. There is some problem with QuickBooks Database Server Manager.