Microsoft has declared the Edge ready for enterprise testing, and by doing so we now have MSI installers and new ADMX files.
I have previously written that I am impressed by this new browser, and this has not changed, I still think that Edge (Chromium) has potential to be the preferred enterprise browser http://blog.mindcore.dk/2019/06/edge-insider-and-group-policy-support.html.
To download MSI for deployment and ADMX files go to https://www.microsoftedgeinsider.com/en-us/enterprise
One of the new policy settings is Internet Explorer mode, so that the Internet Explorer engine can be used natively in Microsoft Edge. No need for two browsers.
When in Internet Explorer Mode you will see an internet Explorer icon at the address bar, but still in Edge.
Still no support for Enterprise mode, but it should be added later, if we take a look at one of the new policies Configure Internet Explorer integration, we now have the SiteList mentioned, but no policy to set it yet.
Windows Defender Application Guard is also an available feature in the new Edge browser.
Task list with Edge in Application guard mode.
So start testing Edge based on Chromium and deploy with Intune or SCCM.