How to Fix QuickBooks Error Code 6123, 0?

How to Fix QuickBooks Error Code 6123, 0? When using QuickBooks in a multiple-user setup, it is usual to see error code 6123, 0. This error often shows a message saying, “Connection to QuickBooks company file has been lost.” Since this error usually stops access to the company file, it is important to fix it quickly. To better understand QuickBooks error code 6123,0, this article provides detailed information. Keep reading to find out more, or you can contact our technical support at +1-xxx-xxx-xxxx for quick help from our qualified professionals for any QuickBooks questions. What is QuickBooks Error Code 6123, 0? QuickBooks error code 6123, 0 is part of the 6000 series. It often happens when you try to open a company file. This error can also show up in other situations, like: