I found an "official" posting about this issue here: https://support.office.com/en-us/article/Fixes-or-workarounds-for-recent-issues-in-Word-for-Windows-bf6bf17c-2807-4871-83ce-e337ae8f0b86?ui=en-US&rs=en-US&ad=US
copied directly from there it says:
<snip>
The Grammar & Writing Style option is missing in Word 2016 [FIXED]
When accessing the File > Options > Proofing > When correcting spelling and grammar in Word >
Writing Style menu option in Word 2016, Grammar & Style is missing.
Grammar & Style has been replaced by Grammar & more.
Grammar & more is now part of Editor, which is available only to Office 365 subscribers – learn more about Editor
on this thread.
We can confirm that the new Editor feature, which includes style checking options, is a new feature now rolling out to subscribers, not just Insiders. We recognize that the style checking portions of the Editor feature offer similar capabilities to some
features not included in Office 2016, but were included in the prior version. We hear your feedback as this might be an exception to our general policy and though we can’t comment on future plans for the rollout of Office features, we can tell you that the
original style checking options were not included in Office 2016 due to very low usage of the feature. Thanks for the feedback.
</snip>
THAT IS NO FIX!
According to this they have given up on fixing the problem in Word! Quote "Grammar & Style has been replaced by Grammar & More. Grammar and More is part of
Editor..." Editor is a new feature limited to 365 subscribers!
And they have the gall to say that their spyware, aka "telemetry", says that no one is using Grammar Checking. PFFFFFT!!!!! Really? What that tells me is that their telemetry sucks! The numbers are not reliable.
It was bad enough when they making one-time license holders "second class customers" by not providing new features being released to 365 subscribers. I could understand it, kinda, for new (cr)apps. But not for features that are
integrated into the core applications, like grammar or the new charts in excel or Morph in .
NOW, they are increasing the attack on one-time licenses. Now they are actively stripping features out of the programs! Wow, talk about gall!
Come on you yanks! Were are the lawsuits? By now there should be a flock of class action law suits. Or are you too distracted by that ongoing train wreck, your "presidential" election. Nothing "presidential" in the proceedings that I've seen!