John Levi's blog : Easy Approach to Fix QuickBooks Error Code 6210, 0

Error 6210 in QuickBooks typically shows when users attempt to use QuickBooks company files in the multi-user mode. This error pops up when a misconfigured workstation is being used as a network server.

This article shall solve all of the doubts emanating in the minds of users regarding QuickBooks error 6210, including the multiple troubleshooting approaches to fix Error 6210 in QuickBooks. But before making a direct jump to the troubleshooting steps, it is recommended that users go through the various factors that could lead to this error.

Factors causing QuickBooks Error 6210

The Network and Transaction Log files might be damaged.
QuickBooks Desktop installed improperly.
The user doesn't possess the administrator permissions on the server PC.
The server disruption caused by the Windows Firewall may also evoke the QB error 6210.

Walkthrough to Fix QuickBooks Error 6210 0

The various methods for rooting out this technical snag in QuickBooks are discussed thoroughly in this section. So, make sure to keep an attentive eye while performing the troubleshoot and do not skip any step.

Method 1: Switch to Single-user mode

Open QuickBooks and select the File option.
After that, click on Utilities.
Next, select the option to Stop Hosting Multi-User Mode.
Give the previous operation one more try and verify if the error still occurs.

Method 2: End any Conflicting Programs

Open the Task Manager by pressing Ctrl + Alt + Delete keys.
Head to the Process tab.
After that, choose all the processes related to QuickBooks, followed by hitting on the End task option.