- Plesk for Linux
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Is it possible to use Let's Encrypt for wildcard certificates in order to secure subdomains like sub.example.com, lists.example.com, etc.?
As for now, Let's Encrypt extension does not support wildcard certificates (*.example.com) and ACMEv2 protocol. This feature will be released in future updates of Let's Encrypt extension. Plesk developers are working on the update.
Custom wildcard certificates can be added as usual according to How to install SSL certificate for a domain in Plesk