Hi,
1).Could you explain your question with more details?
For general RDS deployment, it provides the RD web access for users to remote via the dedicated website shown as below.
Users are also allowed to save the downloaded .rdp file to the local machine for quick launch next time.
2).I assumed that if you were looking for method to open an rdp session to a server from some web pages, you could check suggestions like modifying ActiveX permissions of web broswers.
How to RDP from a web page
https://stackoverflow.com/questions/16064015/how-to-rdp-from-a-web-page/16064606
Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.
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Hope this helps and please help to accept as Answer if the response is useful.
Thanks,
Jenny