I have the same issue especially with grammar checker not working since update. I have posted a question last week, but am getting no where. So I am adding to this thread in the hopes that we can relay to Microsoft that this is a real issue.
This issue popped up after the update wherein Microsoft redesigned the Check Document editor.
1. The first issue is if you do not have "Check Spelling as you type" and/or "Mark Grammar as you type"; running the "ABC Check Document" button from the "Review" tab will not find any errors. Which makes the Check Document button obsolete.
2. The next issue is that the Grammar Checking is not working. It sporadically may find an error but for the most part it does not find obvious grammatical errors at all. And YES I have checked and double checked all troubleshooting suggestions.
I type: Lets try this again for heavens sake? - it comes up with zero grammatical errors in that sentence.
I have tried this on three office computers that were updated, and it finds zero errors. However, on the one computer that has not been updated and uses the old Editor, it find all the grammar errors.
Can anyone confirm whether or not your grammar checker is working after the update?
Thanks!