QuickBooks Multi-User Mode Not Working After Update" describes a glitch that prevents QuickBooks from functioning in multi-user mode following a software upgrade, making collaboration difficult. Workflow efficiency is impacted when users have trouble accessing files at the same time. Reinstalling software, checking the setup of the network, or contacting technical support are examples of troubleshooting actions. If you would like to speak with someone privately about QuickBooks assistance, please give us a call at 1.855.856.0042.