This is the error often related to QuickBooks multi-user mode. But people often see QuickBooks error code H202 whenever the network fails. When people face QuickBooks database server failing then they might face the following issues:

•                    Your QuickBooks server manager may not run on your Windows.

•                    You may get the error code H202 displayed on your QuickBooks dashboard.

•                    You will not be able to scan your QuickBooks-related folders for further errors. You will see an issue displayed like Network failed, resolve the error, and retry it again.

•                    QuickbooksDB26 will not work properly. Whenever you would want to run the program then it will once start and then will cease to work.

Possible Solution QuickBooks Database Server Manager Network Diagnostics Failed

•                    If the error continues then you will have to stop the DNS and all the QuickBooks services that you may be using.

•                    Now using the command prompt, reserve the port by using the function called netsh.

•                    Once the function will start to run, your network diagnostics will start to work again.

Step 1: Check Network Setup

1.      Ensure Network Connection:

•                    Verify that the computer hosting the QuickBooks company file is properly connected to the network.

2.      Restart Network Devices:

•                    Restart your router, switch, and server to reset network settings.

Step 2: Verify Hosting Settings

1.      On Server:

•                    Open QuickBooks Database Server Manager.

•                    Ensure that the folder containing your company file is listed under "Scan Folders." If not, add it and scan.

2.      On Workstations:

•                    Open QuickBooks, go to "File" > "Utilities."

•                    Make sure the "Host Multi-User Access" option is selected.

Step 3: Configure Firewall and Security Software

1.      Allow QuickBooks Ports:

•                    Configure your firewall to allow QuickBooks ports (default ports: 8019, 56728, 55378-55382).

2.      Add Firewall Exceptions:

•                    Add exceptions for QuickBooks programs in your firewall and antivirus software:

•                    QBW32.exe

•                    QBDBMgrN.exe

•                    QBCFMonitorService.exe

•                    QBDBMgr.exe

Step 4: Verify QuickBooks Services

1.      Open Services:

•                    Press Windows + R, type services.msc, and press Enter.

2.      Locate and Check Services:

•                    Ensure the following services are set to start automatically and are running:

•                    QuickBooks DBXX (where XX is your version, e.g., QuickBooksDB30 for 2020)

•                    QBCF Monitor Service

3.      Restart Services:

•                    If these services are not running, start them manually.

•                    If they are running, restart them.

By following these steps, you should be able to resolve network diagnostics issues with QuickBooks Database Server Manager. If the problem persists, consider contacting QuickBooks support for further assistance.