You can make Web applications, which are hosted on an Active Directory Federation Services (AD FS)-enabled Web server in ...

You can make Web applications, which are hosted on an Active Directory Federation Services (AD FS)-enabled Web server in your network, available for access to federated users that are located in a partner organization by adding the necessary entries to the Federation Service in your organization. After you add the entries and configure one or more AD FS-enabled Web servers to allow access to the Web applications, federated users will be able to access multiple Web applications in your organization using a single sign-on.