Why does my Outlook interface look different?
Why is Outlook different to other email providers? Outlook versions use the Microsoft Word engine to render HTML emails. Email service providers such as Outlook interpret HTML code in different ways which can cause your email to look different in Outlook than what it looks like in your email marketing platform.
How do I get the new Microsoft Office UI?
In Word, Excel, PowerPoint, or OneNote, just open the Coming Soon pane from the megaphone icon in the upper right. You can read more about the visual refresh changes, and switch on Try the new experience to apply the setting to all your Office desktop apps.