- Plesk Onyx
Is there an OX (Open-Xchange) Native Plugin for Plesk Onyx?
Plesk does have Open-Xchange itself as an application to be installed on a domain however, Plesk does not develop anything related to it and both development and support for it, is on Open-Xchange side.
It can be installed as any other web application on Plesk catalog by going to Domains > example.com > Applications and search for it.
For any support request or question regarding the Open-Xchange application it can be addressed at Open-Xchange Support