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CBT Nuggets

Identity & Access · Intermediate

SAML (Security Assertion Markup Language)

SAML is an XML-based standard that lets an identity provider (IdP) tell a service provider that a user has authenticated, including signed assertions about who they are. It is the protocol behind most enterprise single sign-on integrations.

For IT leaders

SAML is the federated-SSO building block your team will repeatedly configure for SaaS apps; clean SAML hygiene avoids account-takeover incidents.

Why IT teams care

Where this shows up at the team level

  • Most enterprise SaaS rollouts require SAML-based SSO from your team's IdP.
  • Misconfigured assertion consumer URLs, certificates, or attribute mappings are common audit findings.
  • Mergers and divestitures require SAML re-pointing across hundreds of apps; tooling and runbooks save weeks.

In production

Where teams encounter it

  • Enterprise IdPs like Microsoft Entra, Okta, Ping, and ADFS
  • SaaS apps configured for federated single sign-on
  • Identity-aware portals and ZTNA gateways

How it works

How SAML actually works

  1. 01When the user accesses a SAML-enabled service provider, they are redirected to the configured IdP for authentication.
  2. 02After authenticating the user, the IdP issues a signed SAML assertion containing identity and attribute claims.
  3. 03The browser posts the assertion to the service provider's assertion consumer URL; the SP validates the signature and creates a session.
  4. 04Trust between IdP and SP relies on shared metadata, certificates, and clock alignment.

In practice

Common team use cases

  • Single sign-on into hundreds of SaaS applications
  • Federating access between partner organizations
  • Centralizing access control and de-provisioning at the IdP

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Related concepts

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