Write up to follow – As usual use at your own risk.
#!/bin/bash
# Script to download, Silent Install and then clean up once Due Device Health
# Writen by twitter.com/richhickson
# www.RichardHickson.com
#Make temp folder for downloads.
mkdir "/tmp/duo/";
cd "/tmp/duo/";
#Download Due Device Health.
curl -L -o /tmp/duo/DuoDeviceHealth-latest.dmg "https://dl.duosecurity.com/DuoDeviceHealth-latest.dmg";
#Mount DMG
hdiutil attach /tmp/duo/DuoDeviceHealth-latest.dmg -nobrowse;
#Install
sudo installer -pkg /Volumes/DuoDeviceHealth/Install-DuoDeviceHealth.pkg -target /;
#Unmount DMG
hdiutil detach /Volumes/DuoDeviceHealth/ -force;
#Tidy Up
sudo rm -rf /tmp/duo/Windows
Invoke-WebRequest -Uri "https://dl.duosecurity.com/DuoDeviceHealth-latest.msi" -OutFile "C:\Users\Public\DuoDeviceHealth-latest.msi"
cd C:\Users\Public\
./DuoDeviceHealth-latest.msi