A service principal is an identity used by an application or service in Azure to authenticate and access resources in a secure, controlled manner — the machine equivalent of a user account for applications running on Azure.
⚙️ How Does It Work?
Service principals are registered in Entra ID and assigned roles/permissions. They authenticate using client secrets, certificates, or federated credentials. Managed Identities are a special type of service principal with automatically managed credentials.
📍 Where Is It Used?
Azure cloud environments — any application, automation script, or CI/CD pipeline needing to access Azure resources programmatically.
💡 Real-World Example
A CI/CD pipeline needs to deploy Azure infrastructure. Instead of using a developer's personal credentials, a service principal with Contributor role scoped to the specific resource group is created. The pipeline authenticates with a certificate — no human credentials involved in deployments.
🔗 Related Terms
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