HTML5 Website customization

Hey Guys,
is there a legit way to customize Buttons and Settings for the HTML5Client?

I mean functions as "change Password" that needs to be deactivated or the "home" button.
The reasons for this changes are that the home button crashes one of our applications if hit. And the Users are not allowed to change passwords because it's a trial environment for future customers.

Thanks,
Thomas

 

You can't disable the "Minimize" button.
But you can disable "Password change" via policies:

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