Did you already add the RDS Session Host role on the server? Also, ensure both Composer Agent and Instant Clone features are disabled when doing the install. Otherwise you won’t get the option for setting the Connection Server at the next step.

Yes, the session host role is already installed on the server.

there is no composer or instant clone feature option during install.

when click next, it goes directly to install step.

the option to select install RDS mode or desktop mode is not showing up

The installer is specifically saying it doesn’t see the RDS Session Host role, which is why it’s throwing the window that you’re seeing. Can you double-check that the role is installed, rebooted, and properly pointing to a RDS license server?

Edit: Ah, I assume you’re just referencing that window and not actually seeing it. Hmmm, that’s odd.

sorry, I mean that selection is NOT showing up.

that screenshot is from another computer which does not have RDSH role.

Maybe try removing the RDS role completely and re-running the agent install to see if it prompts for RDS version? There is no existing Horizon agent already installed, correct?

You only see this page if you deselected both View Composer Agent and Instant Clone Agent features.

Select as answer if this solves or answers your query.!

im facing this issue alot ,and in most of cases there would be one of the below installed :

1- SCCM agent

2- AV agent

3- Desktop management or control agents

4- Security agents

so my advice go and use vanilla windows ,install the agent then go to other agents installations

Have you noticed this with Windows Defender?