When QuickBooks Desktop\'s multi-user mode is unable to connect to the server computer housing the company file, QuickBooks Error Code H202 appears. This error typically implies that communication is being blocked by firewall settings, improper hosting configuration, or network problems. Slow performance, a pop-up error message, and the inability to access the corporate file are some of the symptoms. Checking network connectivity, adjusting firewall settings, and making sure the QuickBooks Database Server Manager is operating are usually the first steps in fixing this error. Make an appointment with a professional QB by calling 1.855.856.0042.