AWS Managed Microsoft AD

• This is Active Directory as a Service managed by AWS
• This can be used to sync the current Domain Controller to AWS Managed AD
  
  

Federated Logins into IAM

• Adding external users to AWS Account
  
• SAML
  • Used to connect to your on-premises Active Directory and sync users as IAM users
    
• Open ID:
  • Used to connect external users from any Open ID compliant Identity System into AWS
  • Refer Here for Open ID Connect

AWS Organizations

• AWS Orgnaizations is logical grouping of AWS accounts beloning to same organization.
• We can enforce common policies for multiple accounts from one centralized location i.e. AWS Organization.