User Configuration > Administrative Templates > Microsoft Office 2016 > What's New
User
HKCU\software\policies\microsoft\office\16.0\excel
This policy setting controls whether the What’s New information is shown when a user opens the desktop version of Excel for the first time after Excel has been updated with new features. By default, the What’s New information is shown. If you enable this policy setting, the What’s New information isn’t shown. Also, the What’s New button in File > Account is disabled. If you disable or don’t configure this policy setting, the What’s New information is shown. Note: There are separate policy settings for Word, Excel, PowerPoint, Outlook, OneNote, and Visio.