Create Generation 1 VHD and set to boot from Debian~.iso
Start VHD and run Install

select options,
- personally I unselect the Debian desktop option and leave the rest default.
login as root or use sudo for the following commands.
now you'll need to add the webmin sources list by editing /etc/apt/sources.list by using nano, vi or another method.
vi /etc/apt/sources.list
then use i to edit the file and (esc) then :wq to write the file to memory.
once you've done that you can add the Webmin PGP key
wget http://www.webmin.com/jcameron-key.asc
then
apt-key add jcameron-key.asc
now update using
apt update
I like to also install perl as it seems to prevent some issues
apt-get install perl libnet-ssleay-perl openssl libauthen-pam-perl libpam-runtime libio-pty-perl apt-show-versions python
and finally install webmin
apt install webmin
continue (y)
Now you can login with https://(server-IP/domain):10000
That's it, your done.