When the QuickBooks Database Server Manager (QBDBMgrN) fails to start, the error QBDBMgrN Not Running On This Computer appears in QuickBooks. Because the server isn't handling the corporate files correctly, this problem usually stops multi-user mode from working. Usually, issue can be fixed by either fixing QuickBooks or restarting the service. Our QuickBooks Experts Team can also be reached by calling 1-855-409-2300.