- Plesk Multi Server
There is no possibility to secure Plesk management node with SSL certificate. The Security Advisor extension does not offer such functionality.
In case Let's Encrypt certificate was applied before activating Plesk Multi Server extension, it is not possible to renew it.
Let's encrypt and Security Advisor extensions are considered as service-node-only.
Internal feature request is created. Vote for this feature at User Voice.
The top-ranked suggestions are likely to be included in the next versions of Plesk.