Mostly you will not need to enable the “Secure the wildcard domain (including www and webmail)”.
However, if you really want to install wildcard SSL certificate, please go Wildcard SSL certificate section below
Wildcard SSL certificate
If you want to install the wildcard SSL certificate by Let’s Encrypt, there will be additional configuration required.
(In this article, we are using yourdomain.com as example. Please change yourdomain.com with your actual domain name)
1. Make sure to enable this option, then click Get it free button
2. The Plesk will showing this kind of information
Depend on which nameservers your domain used :
a. If your domain is using the following nameservers cluster:
Please wait for sometimes until the TXT record for “_acme-challenge.yourdomain.com” propagated (may take few minutes to few hours), then click the Reload button
b. If your domain is not using the above nameservers cluster (ns131 - ns134.mschosting.com), please add the following DNS record to your domain’s DNS zone
RDATA/Value/Target: <Server Name>
The <Server Name> is the hostname of the server which hosted your account. You can find the hostname of the server which hosted your Ebiz 12 hosting account from your Client Area > Services > My Services > click on your Ebiz 12 Product/Service. You will see the Server Name under the Hosting Information.
For the above example, we will need to add a NS record of _acme-challenge.yourdomain.com and point it to e122.mschosting.com
This NS record configuration will make any DNS query to subdomain “_acme-challenge.yourdomain.com” (including TXT record value) will be answered by the the Plesk server which hosted your domain.
Please wait for sometimes until the NS and TXT record for “_acme-challenge.yourdomain.com” propagated (may take few minutes to few hours), then click the Reload button
3. After the wildcard SSL certificate successfully installed, can proceed with the next configuration in Hosting Settings.