User Configuration > Administrative Templates > Microsoft Office 2016 > Language Preferences > Other
User
HKCU\software\policies\microsoft\office\16.0\common\general
This policy setting controls whether Coming Soon is available to users. Coming Soon provides information in an Office app, such as Word or Excel, about upcoming feature changes to that app and lets users try out those changes ahead of time. By default, Coming Soon is available to users. If you enable this policy setting, Coming Soon is turned off and isn't available to users. If you disable or don't configure this policy setting, Coming Soon is available to users.