🔐 How APIM Passes OAuth Tokens to Power Automate Using Managed Identity
A Complete Enterprise Integration Guide Modern enterprise integrations rely on secure, identity-driven communication rather than static credentials. In architectures where Azure API Management (APIM) acts as the gateway and Power Automate flows act as backend orchestrators, authentication must be both secure and scalable. The recommended approach is to use Managed Identity for OAuth token acquisition and transmission. 1. Why Managed Identity? Traditionally, OAuth-based integrations required: App registrations Client ID + Client secret Secret storage and rotation Manual configuration in APIM Managed Identity eliminates these concerns: No secrets to manage Identity bound directly to the APIM instance Automatic token issuance by Azure AD (Entra ID) Strong alignment with Zero Trust security principles 2. High-Level Authentication Flow Client → APIM → Managed Identity → Azure AD → Access Token → Power Automate Flow Flow Breakdown Client sends request to APIM APIM acts as the controll...