If admins enable the Discover app, hovering and clicking the toolbar button will invoke both the sidebar tower, and the new discover experience.

As communicated in our last release ( Microsoft Edge release notes for Stable Channel), the sidebar now includes a toolbar button by default to access the experience. In this release, the sidebar has been enhanced to increase productivity and improve user experience.

The Microsoft Edge sidebar lets users access productivity tools side-by-side with their browsing window. To learn more, see Site compatibility-impacting changes coming to Microsoft Edge. Microsoft Edge Web Platform constantly evolves to improve user experience, security, and privacy. Archived versions of these release notes are available at Archived release notes for Microsoft Edge Beta Channel. These release notes provide information about new features and non-security updates that are included in the Microsoft Edge Beta Channel. Release notes for Microsoft Edge Beta Channel Microsoft Edge release notes for Beta Channel

Microsoft edge beta version