Cannot change child account to adult

Adult accounts cannot be changed to child accounts.

No you cannot set limits on a parent account as it is an adult account. you cannot change an adult account to a child account either. Any limit you set will have to be a physical limit you cannot use anything software wise since they are an adult.

Always recommend starting a child off as a child account.

You cannot change an adult account to a child account.

You cannot change the account created as an adult account down to a child account. It needed to be created as a child account from the get go.

Its not possible to change from an organizer (adult account) to a member (child account). Whether the account is an adult account or child account is dependent on the date of birth entered when the account was first created. The date of birth on the Xbox
account cannot be changed either.