This configuration variable applies only to the thin client automatic update feature. When an event triggers the update process, the thin client displays a message box informing the user that an upgrade is required. The default setting of "1" (on, true, yes) for the TC_AUTO_UPDATE_QUERY configuration variable enables the display of that message box. Setting this variable to "0" (off, false, no) prevents the message box from appearing.
See Informing the User When an Update Is Needed for more information about this variable.