You can customize menu and sidebar content using the context in which the menu renders.
Merge invoices to combine multiple separate invoices into a single comprehensive invoice and delete the previous separate invoices.
Troubleshoot and resolve problems with addon modules not displaying correctly in the Admin Area Addons menu.
Troubleshoot and resolve issues with domain renewal invoices that aren't generating.
Troubleshoot and resolve issues with missing payment reminder emails.
Troubleshoot and resolve issues with missing invoices.
Models offer a code-driven method for interacting with the database. Many WHMCS database tables are available as modeled classes.