Editor's note: This article was originally published on February 5, 2021.
Editor’s note: This article was updated on March 24, 2021 to reflect new update timelines for specific version...
Updated May 06, 2021
Version 4.0
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New Microsoft Edge to replace Microsoft Edge Legacy with April’s Windows 10 Update Tuesday release
it doesn't matter if the update includes local admx. If you are in a domain, updating the central store with Edge admx will be good enough. I don't believe anyone is controlling Edge via local GP, thus lcoal admx is not helpful.
not everyone is connected to a domain controller,
and it looks like you're missing the whole point. that's the whole idea of "local group policy editor", it is local. that's why Microsoft put it there.
of course server has access to a different variant of it which is called Group Policy Management Console (GPMC)
you say it is not useful, which is your opinion, but people and specially Microsoft think differently and that's why they put Edge legacy's group policy files, by default, in Windows 10 in the first place.
so group policy files that are already in Windows 10 and belong to Edge legacy, need to be removed and ideally replaced by the new Edge's.