You can enable single sign-on (SSO) to your AWS accounts by using federation and AWS
Identity and Access Management (IAM). By federating your AWS accounts, users can sign in to
the AWS Management Console and AWS Command Line Interface (CLI) using credentials from your
corporate directory
Amazon Cognito helps you add user sign-up and sign-in to your mobile and web apps easily, it
is not used for connecting corporate directories
Simple AD is an inexpensive Active Directory-compatible service with common directory
features. It is a standalone directory on AWS and cannot replicate with an on-premise
directory
AWS Organizations offers policy-based management for multiple AWS accounts. With
Organizations, you can create groups of accounts, automate account creation, apply and
manage policies for those group. It is not used for SSO