Does new Office apps work with stylus/pen?

To my knowledge none of Microsoft's apps accept input via handwriting nor drawing. If you want to use a stylus, there are other apps available in which you can write and/or draw, including Penultimate, Notability, and others. You can find suggestions here:

http://appadvice.com/appguides/show/handwriting-apps-for-ipad

Perhaps one of those would work for you.

Regards.

You might have more luck if you ask Microsoft seeing as how it is their product.

Allan