The new Yammer app has landed in Teams for most tenants. Using this app Teams allows users to easily access Yammer and it's community discussions. The new app in Teams is based upon the new Yammer look, where you get a lot of the new features announced at Ignite 2019. The app can be added by admins through policies, or users may add them directly themselves.
If you have not deployed Yammer to your organization, you might want to tell users not to use this app, or hide it from the store.
To access the new app, just click the app icon at the bottom of the left rail, search for "Yammer" and the application called "Communities"
Users may discover that the app does not allow you to switch networks (yet), and they will have to switch to a browser version to do so.
