No, I did not have to drop the microwave. I did have to remove the piece of wood trim above the microwave though. What I used to remove it was a steel rod that was narrow enough to fit between the microwave and the cabinet beside it. I then bent the end of the rod 90 degrees so I could get it in behind the trim and pop that end loose. The trim was attached with some brad nails that I couldn't reuse so cut them off flush. I found that the trim fit very snug and I really didn't need them anyway. Besides the light and wiremold I installed held it in place ( you'll see when I post the pics).
To connect the light to 12v, I popped the light fixture out under the cabinet next to the microwave. I then used a drill with an extra long bit and angled it through the opening to drill a hole in the side of cabinet that is hidden by the microwave. I then snaked a wire through the hole and over the microwave. I notched out the top of the wood trim I removed earlier for the wire to fit in. When it was all done, It looked like it had come from the factory that way (which it SHOULD have).
Rod & Carla B.
The Hounds Kooper & Abby
2015 Sunseeker 3010; '14 Ford Focus toad