Generally, QuickBooks Error 6175 0 occurs whenever you attempt to turn on multi-user mode in QuickBooks. One of the reasons that might evoke the error is when the multi-user settings are not configured correctly or if the Windows Firewall blocks the communication. To deal with such errors, we have discussed some easy ways. Go through them carefully. Ensure that you installed the QB Database Server Manager properly Make sure that you have launched the QB application. Go to the Start menu > QuickBooks Database Server Manager > Start Scan option to check whether QBDBMgrN is installed appropriately or not. Now, you are required to look at the status of QuickBooks Desktop error 6175 0. Change the QuickBooksDBXX service to a local system . To begin with, go to the Windows Start menu, type "msc" in the search box, and hit the Enter key. Now, right-click on the QuickBooksDBXX service, click select Properties, followed by the Log on tab. Soon after this, click the Radio button > Next > Apply > OK. At last, you can switch to the multi-user mode once again.