I just posted about the spell checker not working in reply. Achive is the word that triggered it. I have a little more to add.
-
When spell checker went on to the next word it did correct it in the document it had in the spell check window, but not in the actual email.
-
the reply was from an iphone. I find that it works fine with replies to outlook.
So it appears to not be finding the actual word in the email once it has made its decision to correct.