banned account

An appeal would be for an account ban, not a console ban. Account bans and console bans are separate so it would be possible to have the account ban lifted if the enforcement team determined they made a mistake.

There are different kinds of bans an account ban and a console ban. The account ban which a communication ban is will follow your account it is not tied to the console so yes it would follow you to the One.

Hi! if it's a console ban, the account is not affected by the ban. If it's an account ban, you'll have to open a new account.

A console ban will not do anything to your account. Harassment is more likely to cause his account to be permanently banned rather than a console ban. But if there is a console ban it does not ban the accounts on the console.

no their accounts are not account banned.

As you say they arealso banned on the forums if their account is banned. For them to post on any forum including "my xbox account was suspended", they need to create a new account, and refer to the banned gamertag in their post.

so in this case, their gamertags are not banned, because they can use their gamertags here.