The requirement is to be able to search users and groups within your domain using windows Find Users, Contacts, and Group tool.
Click on the Windows symbol on the bottom left corner.
Type “run” and pick the run desktop app
Copy paste the following command into the textbox
windows 7: C:WindowsSystem32rundll32.exe dsquery.dll,OpenQueryWindow
Windows 10 : rundll32 dsquery.dll,OpenQueryWindow
AD search window should open: