Many modern websites have designs that are incompatible with Internet Explorer (IE). When an IE user visits an incompatible public website, the user may get a message. The message states that the website is incompatible with the browser. After the message is displayed, the user is expected to manually switch to a modern browser. To minimize disruptions, starting with version 84, Microsoft Edge supports a new capability that automatically redirects users. When an IE user navigates to a website that is incompatible with IE, Windows automatically redirects the user to Microsoft Edge.

Source: [Moving users to Microsoft Edge from Internet Explorer - Microsoft Edge Development Microsoft Docs](

This seems like something that should be in the page markup rather than requiring an email to Microsoft, but at least there’s an option.