You can view information about sessions running on a terminal server on the Sessions tab in Terminal Services Manager.
The Sessions tab presents basically the same information as the Users tab, but the information is organized into sessions rather than users. This screen shows even sessions that wouldn’t appear on the Users tab because they aren’t related to users, such as the Services session.
You can interact with any of the sessions you see simply by right clicking it.
You’ll call up a menu that contains several options which allow you to disconnect session, send a message to them, shadow (remotely control) their sessions or even allow you to reset a session.
Graphs for each session are shown on the bottom part of the window. Graphs by CPU Usage, Memory Usage, Processes, RDP Incoming and Outgoing Bytes are available.
Choose a tab above graphs to view a parameter.