You are an administrator for a company named Contoso, Ltd. Contoso has an Exchange Server 2013 organization. Contoso has

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You are an administrator for a company named Contoso, Ltd.
Contoso has an Exchange Server 2013 organization.
Contoso has a partnership agreement with a company named ADatum Corporation. ADatum has an Exchange server 2013 organization.
Both organizations have a federation trust to the Microsoft Federation Gateway. Users at Contoso plan to share their free/busy information with users at ADatum.
You need to recommend which tasks must be performed to ensure that the ADatum users can see the free/busy information of the Contoso users.
Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

A. In the Exchange Server organization of Contoso, configure directory synchronization.
B. In the Exchange Server organization of ADatum, create a sharing policy.
C. In the Exchange Server organization of ADatum, configure directory synchronization.
D. In the Exchange Server organization of Contoso, create an organization relationship.
E. In the Exchange Server organization of Contoso, create a sharing policy.
F. In the Exchange Server organization of ADatum, create an organization relationship.