Configure WHMCS to automatically delete data for inactive clients after they have terminated all services and a period of time has lapsed.
You must disable MySQL® Strict Mode in order to run WHMCS on your server.
You can disable all outgoing mail from your WHMCS installation.
Configure two-factor authentication (2FA) for Admin Area logins. 2FA enhances security by adding a second step to the login process.
Configure two-factor authentication (2FA) for Client Area logins. 2FA enhances security by adding a second step to the login process.
Enable cross-selling in WHMCS. You can select the locations in which recommendations appear and configure how they display to customers.
You can configure WHMCS to use an encrypted MySQL® database.