To fix the QuickBooks H202 error in multi-user mode, first, ensure QuickBooks services are running. Next, verify hosting settings on each workstation: select File > Utilities > Stop Hosting Multi-User Access, then restart it by selecting File > Utilities > Host Multi-User Access. Check firewall settings to allow QuickBooks connections. If issues persist, edit the Windows host file. Open Notepad as an administrator, then open C:\Windows\System32\Drivers\Etc\hosts. Add server IP and name, then save. If the problem persists, consult QuickBooks Help for further assistance.
