Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature currently requires accessing the site using the built-in Safari browser.
If you are still using CentOS 7.9, it's time to convert to Alma 8 with the free centos2alma tool by Plesk or Plesk Migrator. Please let us know your experiences or concerns in this thread: CentOS2Alma discussion
Webmail is not Plesk product, If you want to cutomize it. It is better try to find solution on vendor site. Plesk does not provide this feature. You can easily find where horde file located. rpm -ql bla bla bla =))