You have a hybrid Exchange Server 2016 organization. Some of the mailboxes in the research
department are hosted on-premises. Other mailboxes in the research department are stored in
Microsoft Office 365. You need to search the mailboxes in the research department for email
messages that contain a specific keyword in the message body. What should you do?

A.
From the Exchange Online Exchange admin center, search the delivery reports.

B.
Form the on-premises Exchange Center, search the delivery reports.

C.
From the Exchange Online Exchange admin center, create a new In-Place eDiscovery & Hold.

D.
From the Office 365 Compliance Center, create a new Compliance Search.

E.
From the on-premises Exchange admin center, create a new In-Place eDiscovery & Hold.

Explanation:
https://technet.microsoft.com/en-us/library/dd298021(v=exchg.160).aspx#howitworks