WSSA reports the following error on the UI and the agent fails to get connected to the service.
This issue generally happens when logging in to a machine via RDP
This error is encountered when a user is not logged in to the computer from the physical console (where the keyboard, monitor, and mouse are physically connected to it). For example, a user connected through Remote Desktop (RDP). If this is a required environment, re-install WSS Agent with the Multiple Concurrent Users (MCU) option enabled. uninstall the agent and then reinstall it from a command prompt using the command below;
msiexec -i \Path\To\wssa-installer.msi MCU=1
Please replace “\Path\To\wssa-installer.msi” with the path and filename of your WSS agent MSI installer file.