When creating RSS feeds to items in SharePoint, some of my users are promted to create them in the browser, and some are created in Outlook. 

 

I can't figure out what the trigger is as to why it chooses one or the other.  They don't want them in the browser, they want them in Outlook. 

 

What setting do we need to change where that forces all RSS feeds to go to Outlook instead of IE?