HTML5 connection works, but if RemoteApp is selected, the connection won’t work, and it will disconnect. 


Error message: 

RemoteApp Disconnected 

This computer can’t connect to the remote computer. 

Try connecting again. If the problem continues, contact the owner of the remote computer or your network administrator. 

Graphical user interface, application 
Description automatically generated 


The remote PC (workstation, not the server) registry is missing CredSSP Parameters 



add CredSSP > Parameter to the PC registry 


Check this page: