Not sure of which model, but if it is above fridge there is a wood bar in front of it. On top there are two small round stickers. remove them to see the screws and then unscrew to remove the bar. Then remove microwave.
I've just had to remove and repair the microwave in my Elddis Xplore 304.
The door surround just raised up like any other overhead locker. At the bottom of the microwave was a metal bracket with three screws attaching it to the wooden plinth. Unscrewed these and the microwave could then slide out.