

For step-by-step instructions on registering an app, see the app registration quickstart. When you register an app in the Azure portal, you choose whether it's a single tenant (only accessible in your tenant) or multi-tenant (accessible in other tenants) and can optionally set a redirect URI (where the access token is sent to). When you register your application with Azure AD, you're creating an identity configuration for your application that allows it to integrate with Azure AD. To delegate Identity and Access Management functions to Azure AD, an application must be registered with an Azure AD tenant.

A multi-tenant example scenario is also presented to illustrate the relationship between an application's application object and corresponding service principal objects. This article describes application registration, application objects, and service principals in Azure Active Directory (Azure AD): what they are, how they're used, and how they are related to each other.
