What Does "QuickBooks Not Connecting to Server" Mean? QuickBooks Not Connecting to Server is a frustrating multi-user mode issue where a workstation cannot communicate with the computer hosting your company file . Instead of opening your data normally, you might see error messages like H202, H303, H505, or simply "QuickBooks is trying to connect to the server..." with a spinning wheel that never ends . If you are staring at a frozen connecti...