You must disable MySQL® Strict Mode (sql_mode) to successfully run a self-hosted WHMCS installation. We recommend disabling this immediately after you finish installation.
You can configure WHMCS to use an encrypted MySQL® database with your self-hosted WHMCS installation. This requires additional steps to add settings to your configuration.php file.
WHMCS supports using Amazon S3™ and Amazon S3-compatible services as storage providers. After you create an Amazon S3 bucket, you can configure it as your storage location.