Simple solution…
Go to Task Manager on the Remote Machine and check your RDP ID in the “Users” tab, in my case it was “2”.
Then open notepad, and write the following (assuming your ID is 2, change the number after tscon to suite)…
tscon 2 /dest:console
cd C:\Program Files\SketchUp\SketchUp 2017
sketchup.exe
Select the file type as “All Files” and then enter the filename as Sketchup Launcher.bat and save to your desktop.
When you login to RDP, click on the shortcut. It will disconnect you from RDP and open up Sketchup in the local console. Wait a few seconds and re-connect your RDP - Sketchup will be open.
There are more elegant .bat code solutions available now online here…
https://forums.sketchup.com/t/sketchup-can-not-run-through-window-rdp/100389/9