How To Use The Microsoft Outlook Add-on For Edge Browser
Microsoft Edge has an official add-on for Outlook by which you can directly check for emails and schedule events without opening Outlook.com in a new tab.
Download and install it from the Edge Add-ons page here.
After it is added, initially the add-on icon would be grayed out.
Click on it and log in with your Outlook.com credentials.
It will display the Outlook inbox as a drop-down.
To compose...