QuickBooks Error H505 is one of the most common issues users face while switching to multi-user mode. It usually appears when QuickBooks can't connect to the company file on a different computer. This connectivity issue restricts collaboration and may halt your accounting processes. If you're struggling with this error, call now: +1-800-223-1608 and speak with a certified QuickBooks expert. What is QuickBooks Error H505? QuickBooks Error H505 occ...