These steps can be used to fix QuickBooks Error Code H202. The first step is to install or update QuickBooks Database Server management from your host PC. Examine the services offered by your server as well. Add services to the Windows admin group on the host system at this point. Configure the firewall on your host computer as well. From a workstation, ping your server as well. To complete this, add your server to the Windows hosts file. It is suggested to give the aforementioned tasks to your IT consultant.