They may be referring to the Windows dialog box that appears in the bottom right corner of the screen.
If you don’t want this to display, it usually requires a GPO change. If there is an AD GPO controlling the behavior you should investigate having it modified, or applying an overriding GPO in the same OU, or a parent OU to the one your computer(s) is in.
If there is no Domain GPO controlling the behavior, it may be a default “Local GPO”. See the response from @JasonWalker to THIS THREAD.