How to Fix Can't Access Company Files in Multi-User Mode When QuickBooks users are unable to open or work on company files at the same time, the message Can't Access Company Files in Multi-User Mode appears. Incorrect folder permissions, firewall settings, or network issues are frequently the cause of this problem. Its resolution guarantees continual access to vital financial data and seamless multi-user collaboration. Call 1.855.738.2784 to talk to a QuickBooks expert if you need assistance. URL: https://hackmd.io/@markwilliam8506/can-not-access-quickbooks-company-files-in-multi-user-mode-read-this-blog