I want to use RoundCube as WebMail Client but I cannot find it in the Updates & Upgrades List.
I found an article that says it can be installed there but it does not show up in my list.
By default, Horde and RoundCube webmails are installed on Plesk for Linux, and only Horde is installed on Plesk for Windows.
Additionally, Plesk for Windows supports the following webmail clients: