Frank,
After checking and having changed the .service file, still my script doesn't start at boot. But it works perfectly when launched manually.
Please find the content of my script an .service file as follows:
SCRIPT: /usr/bin/mount-box.sh
#!/usr/bin/sh
mount -t davfs https://dav.box.com/dav /mnt/MPD/LocalStorage/box
SERVICE: /etc/systemd/system/mount-box.service
[Unit]
Description=launch mount sequence automatically when the system starts up
After=network.target
[Service]
ExecStart=/usr/bin/sh /usr/bin/mount-box.sh
[Install]
WantedBy=multi-user.target
Should you spot something wrong, please be so kind to highlight it to me.
Thanks again.