Azure API Management gateway with Okta OAuth 2.0/OIDC authentication secures API traffic to SAP S/4HANA and Salesforce CRM backends. Client requests flow through Azure APIM, where Okta IAM validates JWT tokens, enforces groups and roles, then routes authenticated calls via JWT Validation Policy to SAP API Gateway and Salesforce Connector. Rate limiting, throttling, and request transformation protect backend systems while Key Vault manages secrets and Azure Monitor tracks all API activity. This architecture demonstrates zero-trust API security, multi-tenant SaaS integration, and compliance-ready monitoring for enterprise hybrid cloud workloads. Fork this diagram on Diagrams.so to customize policies, add additional backends, or adjust rate-limiting thresholds for your organization. The pattern scales across multiple resource groups and subscriptions for large-scale enterprise deployments.