It would be good that a client can request an extension of "Hard Disk", "Transfer", "Domains", etc. on cPanel.
Something similar to: "Application Links"..
Thanks for your suggestion. Such a function has now been added to the cPanel API and we are pleased to bring this to WHMCS version 7.3! When a customer is approaching their usage limits in cPanel, an upgrade icon will now appear which takes them directly to the upgrade/downgrade options page within the WHMCS client area.
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