Which are the deprecated functionalities in Plesk Obsidian 18?
The following components and features are deprecated in Plesk Obsidian 18:
Plesk VPN was a component that allowed setting up an OpenVPN service on a server. However, due to consistently low installation numbers and significant resources needed to update it for compatibility with Plesk Obsidian it has been decided to stop its development. If you have Plesk VPN installed on your server and upgrade to Plesk Obsidian, you will lose the ability to configure OpenVPN server from the Plesk interface.
Plesk Skins was a component that provided additional Plesk skins. To simplify the UX and remove rarely used non-default color schemes, only two color schemes are available since Plesk Obsidian: Obsidian and Onyx.