Stretch november version:

1. Add stretch-backports to sources.list

Create:   sudo nano /etc/apt/sources.list.d/backports.list
Add:      deb http://ftp.debian.org/debian stretch-backports main

Update:   sudo apt-get update

Ignore complaints about not signed

2. XRDP is in stretch-backports

Use apt or apt-get, need to install with the -t option.
Answer Y to install without verification.

sudo apt-get -t stretch-backports install xrdp

Ignore complaints about not verified

3. Shutdown menu not working:

You can get the Buttons working, just change the line ‘Logout=lxde-pi-shutdown-helper’ to ‘Logout=gksudo lxde-pi-shutdown-helper’
in ‘/home/pi/.config/lxpanel/LXDE-pi/config’.

3. Raspi config tool:

In order to run ‘Raspberry PI Configuration’ tool and others that need ‘sudo’ to run in Remote GUI, insert X authorization of ‘xhost’ for ‘root’ in:
/home/pi/.config/lxsession/LXDE-pi/autostart –> Insert ‘@xhost si:localuser:root’ as last line.”

If no file named autostart at this folder location use nano to create it and then add the line ‘@xhost si:localuser:root’ and save the file.