Hi @Aimero ,
Looks like the Browser_Home
key is not blocked in Kiosk mode as I successfully reproduced this issue. Please report this problem to the Edge Dev Team at ··· menu --> Help and feedback --> Send feedback.
As a workaround, you can specify homepage URL with HomepageLocation policy, so even if the "Home button" is pressed, it will only navigate to the URL you specified.
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Best Regards,
Shijie Li