In this tutorial we will explain the steps to install our Let's Encrypt certificate on our server's DNS and access our Plesk panel without the warning that the certificate is unsafe.

First, it is necessary to access our Plesk server and go to Tools and Settings.

Once inside the tab, we will go to SSL/TLS Certificates in the Security section.

Within this tab, we will click on the Let's Encrypt button.

In this window, our server's DNS will appear by default, so we just have to click on Renew.

Now we have to configure Plesk to use the certificate we just installed.
To do this, we will click on Change in Certificate for securing Plesk within SSL/TLS Certificates.

In the following window, we will have to select the certificate we just installed and click on OK.

After the next step, you will be able to use the server's DNS to securely access your Control Panel.