To resolve issues with QuickBooks Multi-User Mode Not Working, start by ensuring all computers are properly connected to the same network. Check the QuickBooks Database Server Manager to confirm it’s installed and up-to-date on the server computer. Make sure firewalls or antivirus software aren’t blocking QuickBooks access. Repair the QuickBooks installation if needed and verify user permissions for proper access. Additionally, running the Verify Data and Rebuild Data utilities can fix potential file corruption. If the problem continues, contacting QuickBooks support for advanced troubleshooting may be necessary.
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