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QuickBooks Error H202 occurs when users attempt to switch to multi-user mode but the software is unable to communicate with the company file located on the server. This error prevents workstations from accessing the file, disrupting collaboration and workflow. The error message usually indicates a network or configuration problem.
Causes of QuickBooks Error H202
Before fixing the error, it’s important to understand its common causes:
Incorrect hosting configuration – Workstations may be set to host files instead of the server.
Blocked communication – Firewall or antivirus programs might be restricting QuickBooks processes.
Damaged or missing .ND file – This file is essential for connecting QuickBooks to the server.
Inactive QuickBooks Database Server Manager – If this service is not running, multi-user mode fails.
DNS or IP address issues – Incorrect DNS settings may block server connections.
Step-by-Step Troubleshooting
1. Verify Hosting SettingsOn each workstation, open QuickBooks.
Navigate to File > Utilities.
Ensure only the server computer is hosting. If you see “Stop Hosting Multi-User Access” on a workstation, select it to disable hosting.
2. Use QuickBooks Database Server Manager
Open the Database Server Manager on your server computer.
Rescan the folder containing your company file.
This action refreshes the network setup and resolves connection issues.
3. Check Firewall and Security Settings
Configure firewall settings to allow QuickBooks programs such as QBDBMgrN.exe and QBCFMonitorService.exe.
Add inbound and outbound rules for QuickBooks ports: 8019, 56728, 55378–55382.
Temporarily disable antivirus software if it blocks communication.
4. Recreate the .ND File
Navigate to the folder containing your company file.
Locate the file with the same name as your company file but ending with .ND.
Delete it and rescan your company files using Database Server Manager to create a new .ND file.
5. Test Network Connectivity
Open the Command Prompt and type ping [server name] from each workstation.
If the response is unsuccessful, there may be a network issue or incorrect DNS configuration.
6. Restart QuickBooks Services
On the server computer, open Services.msc.
Locate and restart the following services:
QuickBooksDBXX (XX = version year)
QBCFMonitorService
7. Use QuickBooks Tool Hub
Download and install the latest version of QuickBooks Tool Hub.
Go to the Network Issues tab and run the tool to automatically diagnose and fix H202 errors.
Preventing Error H202 in the Future
Keep QuickBooks Desktop and Windows updated.
Regularly maintain firewall and antivirus settings to allow QuickBooks communication.
Ensure only the server computer hosts company files.
Perform regular scans with Database Server Manager after moving or renaming company files.
Conclusion
QuickBooks Error H202 is a common multi-user mode issue, but it can be resolved by checking hosting settings, reconfiguring firewall rules, repairing .ND files, and using Database Server Manager or Tool Hub. Following this step-by-step guide ensures smooth access to company files across all workstations and prevents workflow disruptions.
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