In xConsole, right mouse click on the user in the "Logged in" and choose "Shut down". From the F1 - Help text:
This section of the xConsole window displays a list of all Adagio users logged into any dataset on your system.
By default, the grid is sorted in ascending order by the date and time that each user logged into each module. The exception is that the first user to log into the system is shown at the top of the grid/list and an asterisk displays beside their Adagio user name.
While the columns are fixed, double-clicking a column heading will sort the contents of the grid using that column in either ascending or descending order. An arrow displays in the column title the grid is sorted by and points up for an ascending order sort or down for descending.
Right clicking on a User record in the grid invokes a pop-up context menu from which you may select to Send a Message to the user or Shut down the application the user is running. You may multiselect and deselect user records using the CTRL and Shift keys and the mouse.
o NOTE: Selecting Shutdown automatically sends a message to the user: "The Adagio System will become unavailable. Please exist Adagio (module name). Shutting down in 5 minutes, 0 seconds." The remaining time before shutdown counts down on the message. Shutdown will occurs in the 5 minutes (the default).