You can hide the buttons for viewing and purchasing SSL/TLS certificates both through the command line and the Partner API.
To remove the buttons for viewing and purchasing SSL/TLS certificates using the command line, run the following command:
plesk bin panel_gui -p -cert_purchasing true
"%plesk_dir%\bin\panel_gui.exe" -p -cert_purchasing true
To remove the buttons for viewing and purchasing SSL/TLS certificates using the Partner API:
partner10.upgradeKey with the API identifier "EXTRAS_BUTTONS_OFF" in the "array of identifiers of upgrade plans" parameter.
For details on these methods specification, please see
http://central.plesk.com/docs/partner-api/1.0, section Specifications of Methods / partner10.createKey
Note: API identifier "EXTRAS_BUTTONS_OFF" also disables the controls related to SSL/TLS certificate selling services and the link to the provider's website.
Important: Once you have turned off a feature through the Partner API, there are no documented methods to turn it back on. If you need to perform this reverse operation, please use the web-based user interface, or contact your sales representative.