The primary components of federation delegation are the federation trust, organization relationships, and sharing policies.
The following prerequisites are necessary for creating and managing the federation trust:
The domain used for establishing a federation trust must be resolvable from the Internet. This means that the domain must be resolvable via DNS from the Internet and that the domain is registered with a domain registrar. Best practice is to use your primary SMTP domain (for example, contoso.com) rather than your internal Active Directory namespace, which may not be resolvable from the Internet (for example, contosocorp.local).
For cross-premises scenarios, where an organization ...