A family of Microsoft word processing software products for creating web, email, and print documents.
Those Style Options in Editor which were also part of earlier Office versions (e.g. Passive Voice) are now available for Office 2016 Click-to-Run perpetual users in Office build 16.0.7870.2020 and newer builds. New Grammar and Style options and other ongoing enhancements to the experience, will continue to be exclusively offered through an Office 365 subscription.
The "Grammar & More" Writing Style is not available in the drop down yet. To enable the Style Options in Word, go to File -> Options -> Proofing and click on the "Settings…" button next to the Writing Style drop down "Grammar". The Grammar Settings window will pop up where you can customize the checks. You will first see the available Grammar Options and when you scroll down, you will see the Style Options starting with Options for "Clarity & Conciseness".
Just check the checkbox next to the Options you'd like to enable.