@Lakshan Perera, Thanks for posting in Q&A. After researching, I didn't find the app configuration policy setting to set the workspace URL mentioned in our official document.
You can open case to double confirm on this:
https://video2.skills-academy.com/en-us/mem/get-support
If there's no such feature, you can contact Remote Desktop support to see if they can add this feature in the future:
Thanks for your understanding.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
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.