Active Directory Federation Services is a feature and web service in the Windows Server Operating System that allows sharing of identity information outside a company’s network. It authenticates users with their usernames and passwords. Users can access some applications (i.e. Office 365, Salesforce.com, etc.) without being prompted to provide login credentials again.
Organizations planning to move their infrastructure to the cloud have to carefully consider how to manage the access to their services. Network IP addressing and domain naming are at the center of any migration strategy, or simply any IT services management.