It also carries the theme color you choose. The only difference we noticed is a ribbon at the top, which looks more like Outlook desktop with a “View” and “Home” buttons.
Once you boot up into this One Outlook client you should notice that it is basically the same as. Changing the theme in the One Outlook also changes it in the Outlook Web App too, so there seems to be some cloud syncing going on here. Our theme settings, and density settings were just a few things that were imported from the existing Outlook app. This could be a confirmation that One Outlook isn’t meant to replace anything, but rather live alongside the desktop app for the time being. When you install the One Outlook Client on Windows 11, you’ll be guided to import your settings from the existing Outlook app on Windows.