Chapter 3. Federation services and authentication

In a typical Office 365 implementation, your users exist in Azure Active Directory (AAD) primarily because of directory synchronization, discussed in detail in Chapter 4, “Directory Synchronization Basics,” and Chapter 5, “Installing Azure AD Connect.” However, in addition to the several identity types available, depending on how your users are created, several options are also available for user sign-in and authentication.

Each of these options has a different set of requirements and affects the implementation of directory synchronization as well as possibly driving other infrastructure requirements and even Azure AD licensed ...

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