April 14, 2026
SSO, SAML & OAuth in Vendor Security Questionnaires: What Buyers Ask
Standard answers for enterprise SSO: SAML 2.0, SCIM, MFA enforcement, session timeout, and OAuth scopes—ready for security review.
SAML SSO questionnaireSCIM vendor securityMFA security questionnaireidentity management assessment
Identity and access management questions appear on almost every enterprise security questionnaire—whether the file is labeled SIG, CAIQ, or "IT Security Addendum." Buyers want to know how customers authenticate, how admins are protected, how sessions expire, and how APIs separate OAuth scopes from user permissions.
Because the same questions recur, the winning strategy is build once, reuse everywhere—with engineering-reviewed golden paragraphs stored in a knowledge vault.
SAML 2.0 and SSO basics buyers expect
Be prepared to explain:
- IdP-initiated vs SP-initiated flows (if both supported)
- Supported bindings (often HTTP-Redirect / HTTP-POST)
- Certificate rotation and metadata exchange
- Whether SSO is required, optional, or tier-gated
Avoid marketing adjectives; security assessment reviewers prefer factual protocol-level answers.
SCIM and lifecycle provisioning
If you support SCIM, document which attributes you map (groups, roles, deprovision timing). If you do not support SCIM, say so clearly—buyers may accept JIT provisioning with documented offboarding instead.
MFA: who must use it?
Buyers often separate admin MFA from end-user MFA. State exactly which roles require MFA, which factors are allowed, and whether phishing-resistant methods are available or on the roadmap. Inconsistent MFA answers between questionnaire, trust page, and support docs are a common source of redlines.
OAuth, API keys, and least privilege
API sections overlap with identity—see also API security assessments. Buyers ask about OAuth grant types, scope minimization, key rotation, and rate limiting. Pull language from internal API security guidelines so sales engineers do not freestyle.
Session management and timeout
Questionnaires often ask for idle timeout, absolute session lifetime, and re-auth rules for sensitive actions. These should match product behavior. If multiple products exist, specify per-product.
How SecureFlow helps
Upload your IdP integration guide, SSO FAQ, and API auth docs. When the next vendor security questionnaire arrives, retrieval-based drafting can assemble consistent answers with citations back to those sources (tutorial).
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