@williamacker
Hello, My name is Wiliam Acker. I am an accountant. I use QuickBooks software for accounting to make my work easy. I help people solve errors related to QuickBooks like QuickBooks error code -6210, 0. This error occurs if the QuickBooks software is not installed correctly. The multi-user error is described as the cause of QuickBooks error code 6210. Use the QuickBooks database server manager to solve this error.