During installation of EP component on sharepoint 2013 if you face following issue 

Server was unable to process request. ---> Could not retrieve a valid Windows identity. ---> The message could not be dispatched because the service at the endpoint address 'net.pipe://localhost/s4u/022694f3-9fbd-422b-b4b2-312e25dae2a2' is unavailable for the protocol of the address.

To resolve this issue, in SharePoint Central Administration, click System Settings > Manage services on server. Start the Claims to Windows Token Service