The User Sessions Explorer is displayed as a separate Sessions folder under the server node in the Object Explorer tree. You have to connect to the server to be able to use user sessions explorer.
User Session List View
To display the user session list, select the Sessions node in the Object Explorer under the selected server. The list of all user sessions is displayed in the Properties Panel. You can sort this list by any columns using Sort popup menu in the grid.
You can also get list of all sessions in the Object Explorer by expanding the Sessions folder. User Sessions are always sorted by session ID in the explorer tree. This view is convenient if you want to navigate to session details for several sessions.
User Session Details View
The Session Details view displays the properties for a selected user session. To display this view, select the required user session in the Object Explorer or in the User Sessions list in the Properties Panel and choose Properties popup menu.