Mendeley has just released a brand new version of Mendeley called Mendeley Reference Manager.
The Mendeley Cite citation tool is compatible with Microsoft 365, Office 2016 and up to and including the Office app for iPad
To get started with Mendeley, you first need to create an account
Then, you must
From Mendeley Reference Manager - Tools you install the Web Importer and Mendeley Cite
This will take you to mendeley.com/import, where you can download the web importer
The web importer is the placed at the top right corner of your browser
Then you install Mendeley Cite
In word you will find Mendeley Cite under the references tab