In EPDM administration, on group settings, there are settings controlled by checkboxes. While clicking on the checkbox with the mouse, it can be unchecked, checked, or marked with a little "square" (these 3 values cycle through each other while clicking the checkbox):
So what does the third value of "square" mean?
The square means that it is inherited from the selection above. You can uncheck and check it again to show a check like the option at the bottom.