You are the enterprise administrator for an Exchange Server 2010 organization. All users run Microsoft Office Outlook 2010. You are designing a sharing solution for your organization and a partner organization. The partner organization also uses Exchange Server 2010. You need to recommend a strategy for sharing information with the partner organization to meet the following requirements:

* Provide cross-organizational access to user contacts
* Provide cross-organizational access to freebusy information

What should you recommend?

A.
Creating cross-forest trusts

B.
Implementing Federated Delegation

C.
Implementing Microsoft Identify Lifecycle Manager (ILM) 2007

D.
Running the Microsoft Exchange Inter-Organization Replication tool