Hi @Achanta Prasad ,
Welcome to the Microsoft Q&A Platform! Thank you for your question.
Azure API Management does not have an inbuilt OAuth server because its main focus is on API management, not identity management. OAuth is a complex protocol that requires handling authentication, consent, and token management. Instead, Azure API Management integrates with external Identity Providers (IdPs) like Azure Active Directory (Azure AD), which specialize in secure authentication and user management. This approach provides flexibility by allowing integration with various authentication mechanisms and enables stronger user authentication and fine-grained authorization. I hope this explanation is helpful. Let me know if you have any further questions.
Feel free to reach out if you need more assistance. I would be happy to help.
Thank you.