Hi d3, you can copy stuff in different ways using the array tools, they're under the Transform palette on the side pane.

Use Transform > Array > Circular for making a circular pattern.

But you generally can't easily copy an already cut hole (not without several additional trimming steps anyway), instead what you would do is copy the cutting object so that you had a circular array of cutting objects, then use those in a Boolean to all cut your base object.

MoI does not have an "automatic feature recognition" type mechanism in it that would try to figure out to directly copy the hole itself, instead you just copy the cutting objects and use them to make all the holes.

- Michael