There is no documentation about ISPConfig 3.2 available. So i ask how to setup Backup in ISPConfig 3.2.
Backup does not need to be set up, you can just enable it on the backup tab of the website and the backup tab of email domains. The backup is then stored in /var/backup folder. If you want to store it remotely, you can mount a network drive to that folder. If you want to mount and unmount the backup folder dynamically, then you can create two scripts for that: /usr/local/ispconfig/server/scripts/backup_dir_mount.sh /usr/local/ispconfig/server/scripts/backup_dir_unmount.sh and enable the backup mount directory option under System > server config in ISPConfig GUI.