Firewalls and anti-virus programs can sometimes block the internet access needed when activating QuickBooks, Zdenek668.

Let's try to configure these programs so you can successfully activate QuickBooks. Please note that QuickBooks Desktop 2019 currently uses dynamic ports which are assigned during the installation process. You can also consult your IT guy to help you update your firewall to its latest release.

Here's how to get the dynamic port number for QuickBooks 2019:

1. Open the QuickBooks Database Server Manager.
2. On the Port Monitor tab, find QuickBooks Desktop 2019.
3. Take note of the Port Number. You will use this for your firewall port exception.

Then, run the QuickBooks File Doctor as it will automatically open and configure the firewall ports. Lastly, proceed with creating firewall exceptions for QuickBooks using the Port Number.

If you're still having troubles with the activation process, it would be best to give us a call. We can do thorough investigation to know what caused the behavior. Please refer to the phone number given by my colleague above.

I'll be around if you need anything else. Thanks for dropping by.