HI
1.0Could you please enter winver in command prompt on RDweb server and look the os version and os version number ?[for example windows 10 enterprise 1809 (os build 17763.316)]
2.Please check if below documents can help you?
changes the big globe background image of the whole site.
https://nedimmehic.org/2017/02/16/remote-desktop-services-2016-standard-deployment-part-4-rd-web-access-part2/
Remote Desktop Services 2016 – Web Customization
https://www.heelpbook.net/2018/remote-desktop-services-2016-web-customization/
============================================
If the Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.