QuickBooks Multi-User Mode Not Working: A Step-by-Step Fix When QuickBooks Multi-User Mode isn’t working, follow these steps: Ensure that hosting mode is enabled on all systems. Confirm network connectivity and that the company file is correctly shared on the server. Check firewall and antivirus settings to ensure they aren’t blocking communication. You may also need to update QuickBooks or repair the installation. Performing these steps will often resolve most Multi-User Mode issues in QuickBooks. https://asquarecloudhosting.quora.com/A-Practical-Guide-to-Install-QB-Database-Server-Manager