Nested App Authentication (NAA) is an advanced authentication protocol for Teams, Outlook, and Microsoft 365 apps that simplifies single sign-on (SSO) across these environments. It addresses the complexities of the traditional on-behalf-of (OBO) model by reducing developer overhead, supporting dynamic consent for scope permissions, and eliminating the need for third-party cookies. Developers can now achieve a more streamlined and user-friendly authentication process.
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