The fixed time shedule does not work great with inregularly used laptops, that's why I made this conditional script that I run from a cronjob every hour. When not at home, it cannot mount the CIFS location, so it will also not backup. To be able to use notifications: add local user to veeam group and run the script with the cron of that user.

veeam-backup-cron

#!/bin/bash
# Cron every hour
backupname=full
timeago='1 day ago'

echo "Starting backup checks at $(date)"
# Check if not on battery
if [ $(upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep state | awk '{print $2}') != "discharging" ] ; then
        echo "[1/2] Not discharging, continuing"
        datetime=$(veeamconfig session list | grep Success | tail -1 | awk '{print $7 "T" $8}')
        dtSec=$(date --date "$datetime" +'%s')
        taSec=$(date --date "$timeago" +'%s')
        #echo "INFO: dtSec=$dtSec, taSec=$taSec" >&2

        # Check if last successful is older then $timeago  
        if [ $dtSec -lt $taSec ] ; then
                echo "[2/2] Older than $timeago, starting backup now"
                notify-send "Backup" "Starting backup $backupname"
                veeamconfig job start --name $backupname --retriable --scheduled --highpriority
        else
                echo "[-/2] Backup made shorter than $timeago, skipping"
        fi
else
        echo "[-/2] Discharging battery, skipping"
fi