Get started with the web client | Microsoft Learn
https://learn.microsoft.com/en-us/windows-server/remote/remote-desktop-services/clients/remote-desktop-web-client
Dec 16, 2022 · To start using an app or desktop, select the item you want to use, enter the same user name and password you used to sign in to the web client if prompted, and then select Submit. You might also be shown a consent dialog to access local resources, like clipboard and printer.