Cancel a service for a specific client immediately in the Admin Area. After you cancel a service, WHMCS will not generate further invoices.
Delete a service to remove it entirely from your records in WHMCS. This will not remove any associated accounts from your servers.
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.