QuickBooks Error code H505 appear when the user tries to get the company files or data on another computer & that computer does not have proper establishment setup or the computer require additional installation or setup. The H series errors are related to the hosting settings problems. This error code appears on the screen, due to one or more of the user’s computers is set to be the QuickBooks server. It should be noted that the user’s computers can function in multi-user mode, but only the server is compatible to word in that way, i.e. system that hosts the company files, should be the only machine configured to act as the host.