Move an existing service from one client to another. WHMCS includes an easy option to change a service's owner in the client profile.
Schedule a service to terminate at the end of the current billing period. When you do this, the system will cancel any unpaid invoices.
Recalculate the Recurring Amount value for a service. You must do this after certain actions, like expiring a cPanel Licensing license.
Upgrade or downgrade a service from the Admin Area or Client Area. If you do this in the Admin Area, you will have additional options.