This helps Outlook feels natural on the OS while still nesting well with elements from Microsoft’s design language. The light, airy design utilizes white surfaces for increased contrast on text and icons. “You will find rounded corners in the buttons, message list, and conversation pane that are influenced by Big Sur. Microsoft has just announced that the Outlook email app would get a major UI overhaul on macOS, with the update to include Fluent icons, rounded corners, and support for Big Sur.
