A corporate environment includes an on-premise deployment of Exchange Server 2010 SP1. Client
computers run Microsoft Outlook 2010. Contractors use a cloud-based Exchange Server 2010 SP1
service and have email accounts on the contractors.contoso.com domain. Employees cannot view
calendar availability information for contractors from their client computers. You need to
recommend the first step in sharing calendar availability information between employees and
contractors. What should you recommend?

A.
Create a sharing policy.

B.
Create an organization relationship.

C.
Create a federation trust.

D.
Create a forest trust.

Explanation: