User Configuration > Administrative Templates > Microsoft Outlook 2016 > Account Settings > RSS Feeds
User
HKCU\software\policies\microsoft\office\16.0\outlook\options\accounts
This policy setting allows you to deploy default RSS Feeds by providing a list of URLs that point to content that is syndicated through RSS. Outlook reads the list when it starts, and the corresponding RSS Feeds are added to each of the user's profiles. By default, users are not subscribed to any RSS Feeds.
If you enable this policy setting, you may specify the URLs in the format: feed://