I can't access DU with my Edge browser

[usonian]

3. This is a wild guess, but does the edge setup do anything unusual?

Like use a proxy, or who knows what, that only a MS expert might know.

In the bizarro universe, an Apple Safari user might be using iCloud private relay, which honestly never screwed up anything except sites that limited downloads from your IP address, which may be the heavily used relay's exit address. I've had this happen with vpn's exit addresses and have flipped them to get around this.

If your address, home or relay, is too hot or that address range is poisoned by one or more bad guys, stuff can happen, but this assumes some kind of relay or proxy.

End of wild guess.