How do I set up RemoteApp to work through Edge IIS?

Question

IIS

Good day,
There is IIS as a reverse proxy server. Exchange and a couple of sites work through it.
I want to add RemoteApp. Everything seems to be normal, the page with the list of applications appears, but for some reason, further connection does not go through. He thinks for a long time, then displays a message as if the PC was turned off.