IDX Broker developer partners have the ability to make changes to client accounts right from the dashboard.
Log-in to your partner dashboard and visit --> Clients --> Client Search
Click Icon on the far left and then under Account Info At a Glance is a blue hyperlink labeled cancel account.
NOTE: This can be done by all developer partners and is the only way to cancel an account with partner billing control enabled.
Click Icon on the far left and then under Management is an option for Upgrade Client
NOTE: This option is only available if partner billing control is enabled.
If you do not have partner billing control enabled, then log-in to the client account and visit the upgrade center as the client.