# QuickBooks Multi-User Mode Not Working? Try These Solutions <p>If QuickBooks Multi-User Mode Not Working is preventing company-file access, call 1-888-440-2022 for assistance with network, hosting, firewall, and configuration issues.</p> <h2>QuickBooks Multi-User Mode Not Working? Try These Solutions</h2> <p>When QuickBooks Multi-User Mode Not Working interrupts access to a shared company file, users may be unable to open the file simultaneously. For troubleshooting assistance, 1-888-440-2022 can help identify common network, hosting, and configuration problems.</p> <p>QuickBooks Multi-User Mode Not Working can occur because of incorrect hosting settings, damaged network configuration, firewall restrictions, or problems with QuickBooks Database Server Manager. 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