AWS Transfer Family servers can now display customized messages, such as organizational policies or terms and conditions to your end users, helping you achieve your legal and compliance requirements. You can also present a customized Message of The Day (MOTD), such as a greeting message, to enhance user experience.
To learn more about using login banners with AWS Transfer Family, please find details in our documentation - https://docs.aws.amazon.com/transfer/latest/userguide/create-server-sftp.html