Identity Authentication
Identity Authentication (IAS) is SAP BTP's cloud identity provider used to authenticate users, federate corporate identity providers, manage trust relationships with subaccounts and applications, and enforce authentication policies across SAP BTP services, Integration Suite, and SAP/non-SAP cloud applications. This topic covers its purpose, core configuration, trust and federation architecture, runtime authentication flow, and production troubleshooting.
Overview
Identity Authentication (IAS) is SAP BTP's cloud identity provider used to authenticate users, federate corporate identity providers, manage trust relationships with subaccounts and applications, and enforce authentication policies across SAP BTP services, Integration Suite, and SAP/non-SAP cloud applications. This topic covers its purpose, core configuration, trust and federation architecture, runtime authentication flow, and production troubleshooting.
Lessons in this topic
- BTP Identity Authentication Part 1: What Identity Authentication DoesSAP Cloud Identity Services – Identity Authentication (IAS) is the central authentication service for SAP cloud apps. Learn its roles (identity provider or proxy to a corporate IdP), applications and user stores, MFA and password policies, and how it connects to BTP subaccounts and SAP SaaS apps.
- BTP Identity Authentication Part 2: Trust and Corporate IdP FederationConnect everything: establish OIDC trust between BTP subaccounts and IAS, add the corporate IdP to IAS (SAML or OIDC), configure subject name identifiers and attributes, send groups, set up Identity Provisioning, and test federation end to end.
- BTP Identity Authentication Part 3: Conditional Authentication and MFAApply risk-appropriate login: conditional authentication rules (route users to different IdPs by email domain, group or type), multi-factor authentication policies, risk-based rules (IP ranges, groups), emergency access, and monitoring login failures.
Interview questions covered
- What are the core concepts of Identity Authentication, and how would you explain them clearly in an SAP interview?
- How would you apply Identity Authentication in a real SAP project? Walk through the design or implementation approach.
- A production issue is reported in Identity Authentication. What would you check first, and how would you troubleshoot it systematically?
- What are the most important design decisions, trade-offs, and best practices in Identity Authentication?
- Suppose you inherit an existing Identity Authentication solution. How would you review it before making a change?
- A company keeps users in both IAS and its corporate directory. Explain Identity Authentication and the target setup.
- Employees, partners and admins need different login policies for BTP apps. How do you design authentication rules?
- Set up trust and corporate IdP federation for new BTP subaccounts.