Issue
Card-paying users who convert to Heroku Enterprise must move apps owned by their Heroku Team to their Enterprise account to consolidate billing.
Resolution
You must be an Admin for any Heroku Teams you want to transfer, as well as be the Admin for the Enterprise account you want to transfer the Team to. We only show teams that you're an admin for when you select teams to transfer on the Dashboard. You can refer to the Dev Center instructions to transfer a team to an Enterprise account.