Executive summary
Amazon Web Services states that AWS IAM Identity Center can use its built-in directory, Active Directory, or an external SAML 2.0 identity provider as the source for identities used in AWS account and application access. The supplied AWS Security Blog metadata says the post was republished on September 2, 2026 to add Active Directory migration strategies and permission-set automation, and that an unplanned change can temporarily interrupt access until assignments are restored.
Deciding Whether the Cutover Risk Is Acceptable
The enterprise decision is not simply which directory should become authoritative; it is whether the organization can preserve operational access while changing that authority. AWS identifies the identity source as the system that supplies user and group information for access decisions, so a transition should be treated as a controlled dependency change rather than a routine configuration update.
A practical review should ask whether current account and application assignments are understood before any switch. If the move is from Active Directory to an external provider, the supplied evidence identifies this as a disruptive case in which users, groups, and related assignments are removed at cutover. That makes backup, restoration sequencing, ownership, and validation criteria central to the approval decision.
Choosing Evaluation Criteria for the Target Identity Model
The source describes different identity-source models: native management inside IAM Identity Center, integration with Microsoft directory infrastructure through AWS Directory Service, and federation through providers that support the relevant protocol. Selection should therefore compare administrative ownership, group governance, recovery steps, and how application access will be re-established after the source of identity changes.
A second decision principle is to separate vendor example from vendor requirement. The supplied metadata says Okta is used as an illustrative provider and not as an endorsement. Procurement and architecture teams should therefore evaluate the target provider against enterprise identity requirements without treating the walkthrough example as a product recommendation.
Technical glossary
- IAM Identity Center
- AWS service described by the source as managing access to AWS accounts and applications through a configured identity source.
- Identity source
- The directory or provider treated as authoritative for user and group information used by IAM Identity Center.
- Permission set assignment
- A mapping that grants a user or group access to a specific AWS account through IAM Identity Center.
- External IdP
- A third-party identity provider connected to IAM Identity Center through a federation protocol supported by the service.
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Transparency
Attribution and source method
Source facts referenced from Amazon Web Services: https://aws.amazon.com/blogs/security/managing-identity-source-transition-for-aws-iam-identity-center. This article is an original Kenzie synthesis and does not reproduce the source article.
Verified source facts used: AWS IAM Identity Center manages access to AWS accounts and applications; it can use an internal identity store, Active Directory, or an external SAML 2.0 identity provider; organizations may change identity sources due to IAM transformation, provider switching, consolidation, SSO adoption, or legacy migration; poor planning can temporarily interrupt access; the AWS post covers switching sources, sample code, architecture guidance, and a runbook using Okta as a non-endorsed example; the Active Directory to external-provider path is described as disruptive because users, groups, and assignments are deleted at cutover, making backup and restoration important. Evidence limits: only the supplied title and RSS summary were used, not the full blog. Claims deliberately not made: no assertion of complete migration steps, code behavior, security controls, legal obligations, Saudi applicability, product endorsement, or success guarantee. Added decision reasoning: the brief frames approval around access-continuity risk, assignment inventory, restoration ownership, and provider evaluation criteria without attributing those governance judgments as additional AWS findings. Automated copyright score: 0. Source-overlap ratio: 0.0044. Longest source match: 9 words. Rights basis: trusted syndicated RSS metadata used only for factual, attributed synthesis.
Amazon Web Services
Managing identity source transition for AWS IAM Identity Center
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