Microsoft Azure Active Directory (Microsoft Azure AD) is a modern developer platform and IAM service that provides identity management and access control capabilities for your cloud applications. It uses industry standard protocols like OAuth2.0, OpenId Connect, and SAML2.0.

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Single sign-on means being able to access all of the applications and resources that you need to do business, by signing in only once using a single user account. Once signed in, you can access all of the applications you need without being required to authenticate (e.g. type a password) a second time.