QuickBooks Multi-User Mode not Working? Try This! QuickBooks is a highly-recommended accounting software by business owners across the globe. But what happens when such an application fails to deliver results when you are stuck in a complicated issue? For many users, their QuickBooks Multi-User Mode not Working correctly when trying to switch to the multi-user mode. This can be a major inconvenience as it directly hampers the daily operations. The Database Manager should be in an active state to facilitate a smooth run of this model, and the inability to do so may consequently result in this issue. Read the full blog to learn some more facts.