New Microsoft Edge to replace Microsoft Edge Legacy with April’s Windows 10 Update Tuesday release

wroot yes depending the version it is just hidden like an IE uninstall. I have not checked if new versions will fully remove it and so the way to tinker with it as outlined above

Disable IE does not uninstall it just preventing Iexplore.exe from being started. As stated you may not uninstall IE feature in the described way if you need to rely on IE.

Next to Exchange ECP limitations there are also following things that do no longer work correctly with IE uninstalled (by design)

MHT support. found in following MS products:

- Outlook open HTML emails externally > there are 3rd party hacks to open with default browser

- Problem Steps recorder saves > use Powerpoint for step recording

- Cluster Management MMC / Cluster Test report > Workaround: Windows Admin Center / PowerShell Test-Cluster

- some parts of Group management console (neglible)

chuckie300 have you read this?

Finally, if you run into compatibility or app issues as you transition to the new Microsoft Edge, there’s App Assure. The App Assure promise is this: if your web apps and sites work on IE 11, supported versions of Google Chrome, or any version of Microsoft Edge (including Microsoft Edge Legacy), those web apps and sites should work on the new Microsoft Edge. If not, you can contact App Assure at no additional cost for remediation support or by email if you experience any challenges submitting your request (ACHELP@microsoft.com). You can also read more about App Assure and Microsoft Edge in this blog.

please use this service to get help working your legacy pages. Otherwise use IE assignments to work with Edge and IE compat mode.