A Microsoft application for managing email, calendars, contacts, and tasks across devices and platforms.
Jesse, I didn't re-install... I recreated an Outlook profile. Since I didn't change the installed software, I think it's a registry setting... I still see it for Word, Excel and PowerPoint... not for Outlook
UPDATE: August 16, 2018, 650pm EDT - Fluent design for Outlook is back! Go figure... don't know why I was seeing the older version.
Fluent Design for Outlook for those of you that don't have it yet...