Which Azure service helps to manage user identities and permissions securely?

Azure Active Directory (Azure AD) is the service specifically designed for managing user identities and permissions in a secure manner within the Azure ecosystem. Azure AD serves as a comprehensive identity and access management solution that supports features like single sign-on, multi-factor authentication, and conditional access policies.

With Azure AD, organizations can manage user accounts, assign permissions based on roles, and track access to various resources within Azure. This ensures that only authorized users can access specific applications and services, which is critical for maintaining security in any IT environment.

Other services, such as Azure Logic Apps, Azure Container Instances, and Azure App Service, are focused on different functionalities such as automation, container management, and web hosting, respectively, and do not specifically address identity and access management. Therefore, Azure Active Directory stands out as the core service for securely managing user identities and their permissions.