You are configuring a SharePoint farm in an environment that includes Microsoft Exchange Server 2013.
You need to ensure that specified SharePoint users can search the Exchange mailboxes of all employees,
place holds on mailbox data, and export mailbox data.
What should you do first?

A.
Create an external content type for Exchange mailbox information.

B.
Configure server-to-server authentication between SharePoint and Exchange.

C.
Create an external list for Exchange mailbox information.

D.
Configure forms-based authentication between SharePoint and Exchange.

Explanation:
toast (3.11.2015): When you receive a new request for eDiscovery, you create an eDiscovery case in the
eDiscovery Center. An eDiscovery case is a collaboration site that you can use to organize information related
to the eDiscovery request. From within an eDiscovery case, you can search for content, apply a hold to content,
export content, and view the status of holds and exports that are associated with the case.
Configure eDiscovery in SharePoint Server 2013:
Configure communication between SharePoint Server 2013 and Exchange Server 2013.
Configure Search to crawl all discoverable content.
Grant permissions.
Create an eDiscovery Center.
sources:
https://technet.microsoft.com/en-GB/library/fp161514.aspx
https://technet.microsoft.com/en-GB/library/fp161516.aspx
JosefTheGreat (30.03.2016): From toast’s first source:
Configure a trust relationship between SharePoint Server 2013 and Exchange Server. For information about
how to configure the trust relationship, see Configure server-to-server authentication in SharePoint 2013.
So B is the right answer 🙂
Fighter, Bomish, Lean: Answer A
Lavera,Ben,TestKing: Answer B