Now available to general consumers and could be useful more to Microsoft 365 subscribers as well as normal users.Irrespective of the New Tab Page layout you choose, the Sidebar stays open and is permanently visible unless you hide it.It supports dark mode and adjusts itself automatically when you resize the Edge window.

You can notice this as an expansion of the App Launcher that appears on the left side of the New Tab Page.It contains shortcuts to Microsoft 365 Apps such as Word, Excel, PowerPoint, Outlook, OneDrive, OneNote, To Do, Calendar and Skype, etc.Office Sidebar is a new feature that was being tested by Microsoft in Edge browser since September last year.The Office Sidebar is now available in the latest Microsoft Edge, here is how you can enable and later disable it if not required. After adding the ability to open Micorsoft office files in the Edge browser, Microsoft is now attaching Office 365’s App Launcher Shortcuts to the left sidebar on New Tab Page to make it easier to open its Apps in the browser.

Customize app launcher office 365