When planning for a multi-cloud environment, how efficiently can IAM be integrated? For instance, if my existing environment uses Microsoft Azure cloud with Azure Entra ID for AD authentication, can additional AWS or any other CSP be integrated according to CAF best practices? Please advise.

To efficiently integrate IAM in a multi-cloud environment with an existing setup using Azure Entra ID, centralize identity management by using Azure Entra ID as the primary identity provider.

Implement SSO and federate identities with AWS IAM Identity Center, utilizing cloud-native IAM services and automating identity provisioning via SCIM or API integration.

Monitor and audit access using Azure Monitor, Azure Sentinel, AWS CloudTrail, and AWS Config.

Adhere to Zero Trust principles by enforcing MFA, conditional access policies, and least privilege access.

Configure SSO and federation, provision users and groups, and apply consistent security policies across both Azure and AWS to maintain a unified and secure IAM strategy.

federation works every time for SSO, but provisioning is what you need to manage IAM cloud provider profiles.
I don't know if MS solutions are enough for that.