Correct Answer: D
Explanation:
A key benefit of federated identity and access management (IAM) is the ability to use an organization's existing identities to access cloud services. Managing Cloud documentation explains that federation allows authentication to occur through a trusted identity provider rather than the cloud service provider.
This enables centralized identity management, reduces credential sprawl, and improves security by enforcing consistent authentication policies such as multi-factor authentication. Federation also simplifies user experience by enabling single sign-on across cloud and on-premises systems.
The other options do not represent core benefits of federated IAM. Therefore, using an organization's identities is the correct answer.