Hey GeorgeSeifert and mekkablue,
An update on the kerning issue:
I erased all kerning data and started over with kerning in the glyphs file.
So now it works in Word (15.9.1). However, the kerning still doesn’t work in Powerpoint (15.19.1)
I tested with both otf and ttf exported from Glyphs 2.3 (OSX 10.11.4)
Kerning works fine in Adobe CC, Safari, Firefox and Chrome.
Hope you can help