Differences between kerning in Adobe Creative Suite and Word

I am experiencing this issue with Word 2011 and Word 2015.

My font looks unkerned but when I activate kerning from Format > Font > Advanced > Kerning for fonts, it looks fine. Is that how it is supposed to work?

I read these articles:

Since the kerning is off (as it appears) by default, would TimAhrens suggestion to assign PUA’s to unencoded kerned glyphs make any difference? Should I not bother about this or is there a way to make the font have kerning on by default?

This is an image from Word 2011. The text on the top is default and the one below is with the kerning activated.