Enhanced Session for Kali Linux.

install.sh

#!/bin/bash
# Original : https://raw.githubusercontent.com/Microsoft/linux-vm-tools/master/arch/install-config.sh

###############################################################################
# Update our machine to the latest code if we need to.
#

if [ "$(id -u)" -ne 0 ]; then
    echo 'This script must be run with root privileges' >&2
    exit 1
fi

apt update && apt upgrade -y

if [ -f /var/run/reboot-required ]; then
    echo "A reboot is required in order to proceed with the install." >&2
    echo "Please reboot and re-run this script to finish the install." >&2
    exit 1
fi

###############################################################################
# Install XRDP
#
apt install -y xrdp

###############################################################################
# Configure XRDP
#
systemctl enable xrdp
systemctl enable xrdp-sesman

# Configure the installed XRDP ini files.
# use vsock transport.
sed -i_orig -e 's/use_vsock=false/use_vsock=true/g' /etc/xrdp/xrdp.ini
# use rdp security.
sed -i_orig -e 's/security_layer=negotiate/security_layer=rdp/g' /etc/xrdp/xrdp.ini
# remove encryption validation.
sed -i_orig -e 's/crypt_level=high/crypt_level=none/g' /etc/xrdp/xrdp.ini
# disable bitmap compression since its local its much faster
sed -i_orig -e 's/bitmap_compression=true/bitmap_compression=false/g' /etc/xrdp/xrdp.ini
sed -n -e 's/max_bpp=32/max_bpp=24/g' /etc/xrdp/xrdp.ini
sed -i_orig -e 's/X11DisplayOffset=10/X11DisplayOffset=0/g' /etc/xrdp/sesman.ini
# Use vsock listener
sed -i_orig -e 's,port=3389,port=vsock://-1:3389,g' /etc/xrdp/xrdp.ini
# rename the redirected drives to 'shared-drives'
sed -i_orig -e 's/FuseMountName=thinclient_drives/FuseMountName=shared-drives/g' /etc/xrdp/sesman.ini

# Change the allowed_users
echo "allowed_users=anybody" > /etc/X11/Xwrapper.config


#Ensure hv_sock gets loaded
if [ ! -e /etc/modules-load.d/hv_sock.conf ]; then
	echo "hv_sock" > /etc/modules-load.d/hv_sock.conf
fi

# Configure the policy xrdp session
cat > /etc/polkit-1/localauthority/50-local.d/45-allow-colord.pkla <<EOF
[Allow Colord all Users]
Identity=unix-user:*
Action=org.freedesktop.color-manager.create-device;org.freedesktop.color-manager.create-profile;org.freedesktop.color-manager.delete-device;org.freedesktop.color-manager.delete-profile;org.freedesktop.color-manager.modify-device;org.freedesktop.color-manager.modify-profile
ResultAny=no
ResultInactive=no
ResultActive=yes
EOF

###############################################################################
# .xinitrc has to be modified manually.
#
#echo "exec gnome-session" > ~/.xinitrc
echo "exec startxfce4" > ~/.xinitrc # thanks @rasschaert and @patrickceg.
echo "You will have to configure .xinitrc to start your windows manager, see https://wiki.archlinux.org/index.php/Xinit"
echo "Reboot your machine to begin using XRDP."

Hmm I noticed there's updates to xrdp with updates to both .ini files, so I wonder if the newest Kali broke something.

EDIT: Confirmed after updates mine's broken in the same way. ...yay it's debugging time... The first thing I noticed is the update overwrote both /etc/xrdp/xrdp.ini and /etc/xrdp/sesman.ini so it would be useful to see what's changed in those.

EDIT 2: Also the error "address already in use" is not referring to IP address / port because there is nothing listening on port 3389 on my system. Therefore it's more likely referring to a "address" for a graphical system (like how VNC sessions have IDs :1, :2, etc). That's just speculation though; essentially it's just that xrdp is now crashing on startup.

I found a solution editing xrdp.ini and changing the port value to this:
port=vsock://-1:3389

That makes it work in Kali with Xfce

Im using the gnome display and after i made the change in /etc/xrdp/xrdp.ini suggested by @nathanVader. I was able to get the slider to connect from HyperV and get the xrdp connect screen but after i input my username and password i get this message.

The enhanced session button is now active but i am unable to use it due to ^. Any Ideas?

does sessman.ini and xrdp.ini listen on the same port?

In Kali with Xfce works well. It seems a different problem with Gnome environment... I'm looking for a solution...

I posted this before in a wrong conversation. I apologize
This is what my .xinitrc file says

but when i run echo $DESKTOP_SESSION i get gnome

Im not used to desktop environments and im not sure what one im using atm?