Out of IdP applications are systems that do not rely on the primary identity provider for authentication and governance. These apps often create blind spots because access may be handled locally, through shared credentials, or by manual processes. They require deliberate discovery, control mapping, and ownership to fit into enterprise IAM.
Expanded Definition
Out of IdP applications are systems that sit outside the primary identity provider’s authentication and governance plane. They may use local usernames and passwords, static API keys, shared admin accounts, or bespoke sign-in flows that are invisible to central IAM controls. In practice, the label is less about product category and more about governance scope: if access is not federated, logged, or lifecycle-managed through the enterprise IdP, the application is out of band.
That distinction matters because these apps often bypass the controls expected in a modern identity program, including SSO policy, MFA enforcement, joiner-mover-leaver workflows, and centralized entitlement review. Definitions vary across vendors because some teams count only fully disconnected apps, while others include any app with partial local authentication or separate admin paths. The most precise operational view is whether the app can be discovered, governed, and revoked through the identity control plane. For broader control alignment, NIST Cybersecurity Framework 2.0 frames this as an identity governance and access management issue, especially where access control cannot be reliably enforced at the enterprise layer. The most common misapplication is assuming an app is “covered” because users access it through a browser bookmark, when authentication and privilege assignment still happen locally.
Related research from Microsoft Entra ID Flaw shows how identity-plane assumptions can fail when tenancy boundaries or app trust paths are misunderstood.
Examples and Use Cases
Implementing governance for out of IdP applications rigorously often introduces discovery and migration overhead, requiring organisations to weigh centralized control against the cost of refactoring legacy access paths.
- A legacy finance portal uses a local admin database and shared credentials, so access reviews must be performed outside the IdP until federation is added.
- An internally hosted operations tool supports SAML for users but still keeps its own separate superuser account, creating a governance gap for privileged access.
- A third-party SaaS app is present in the environment, but the IdP integration was never completed, leaving users provisioned through manual tickets and email approvals.
- A vendor support console allows emergency access with static local credentials, so ownership and revocation need explicit controls beyond standard SSO.
- An acquired business unit runs a standalone identity stack, and its applications remain out of IdP until account consolidation and trust migration are finished.
NHIMG research on OneLogin API Key Vulnerability illustrates how brittle identity dependencies can become when app-level secrets or trust tokens are exposed. For identity program framing, the NIST Cybersecurity Framework 2.0 is useful for mapping discovery, access control, and continuous monitoring obligations.
Why It Matters in NHI Security
Out of IdP applications are especially risky in NHI environments because machine access is often even less visible than human access. A service account or automation script may authenticate directly to the app with a long-lived secret, bypassing centralized policy, rotation, and revocation. That makes the application a blind spot for secrets management, entitlement review, and incident response. NHIMG data shows that only 5.7% of organisations have full visibility into their service accounts, which helps explain why out of IdP systems are repeatedly missed during audits and breach investigations.
The security consequence is not just inconsistency, but loss of control over where identities exist and how they are used. If an application is outside the IdP, then account disablement, step-up authentication, and lifecycle offboarding may fail silently when personnel leave or when automation is repurposed. This problem frequently surfaces during compromise investigations, especially when teams find that a supposedly “decommissioned” credential still works in a forgotten app. Organisations typically encounter the need to classify and retire out of IdP applications only after a credential leak, unauthorized login, or failed offboarding exposes the gap, at which point the term becomes operationally unavoidable to address.
For a governance lens, the NIST Cybersecurity Framework 2.0 and NHIMG’s broader NHI guidance support the practical response: inventory the app, identify the authoritative owner, and decide whether to federate, isolate, or retire it.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 and OWASP Agentic AI Top 10 address the attack and risk surface, while NIST CSF 2.0, NIST Zero Trust (SP 800-207) and NIST SP 800-63 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Out-of-IdP apps create undiscovered NHI and access blind spots. |
| NIST CSF 2.0 | PR.AA | Identity and access management depends on knowing which apps sit outside the IdP. |
| NIST Zero Trust (SP 800-207) | SC.AA | Zero Trust requires verified access paths, not unmanaged local trust in apps. |
| NIST SP 800-63 | IAL2 | Apps outside the IdP often weaken identity proofing and credential assurance. |
| OWASP Agentic AI Top 10 | AIA-04 | Agent and app trust boundaries break when local authentication bypasses central governance. |
Treat every out-of-IdP app as untrusted until its access path is federated or explicitly constrained.
Related resources from NHI Mgmt Group
- How should security teams govern applications that cannot connect to an IdP?
- Who is accountable for federated identity risk when multiple applications rely on one IdP?
- What do teams get wrong about account merging in multi-IdP applications?
- How should IAM leaders govern applications that sit outside the IdP in modern environments?
