QuickBooks error H202 is a purely a network related error because the H-errors family are purely network related and they relates with Windows Firewall, Hosting issues, Connectivity issues in QuickBooks Database Manager and IP or DNS related problems, speaking of error H202 mostly it is seen that it is the Hosting issues that causes the problem this can only be seen in multi-user environment because in a single-user mode there is no client or hosting relationship because there is only PC involved.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 h202 is tough to resolve at times. However, our ProAdvisor can help you fix the problems instantly. You might face some issues understanding deep technical terms while following the steps mentioned above. Call us on our QuickBooks Customer Support Number @ 1-800-396-7703 to get the most reliable solutions.