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單項(xiàng)選擇題

You have an Exchange Server 2010 organization.Users report that they can share free/busy information with users at a federated partner, but they cannot share contacts with those users. You need to ensure that your users can share contacts with users at the federated partner. 
What should you modify?()

A.the Federation Trust
B.the EWS virtual directory
C.the default sharing policy
D.the Organizational Relationship

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