You work as the Enterprise Exchange Administrator at ABC.com. ABC.com is using Microsoft Exchange Server 2010 as their messaging solution.

The ABC.com network contains an Exchange Server 2010 Mailbox server named ABC-EX02.

What actions must you take to check when employees last logged on to ABC-EX02?

A.
You must configure real time block lists (RBLs).

B.
You must use the Exchange Server User Monitor (ExMon).

C.
You must use the Get-MailboxStatistics.

D.
You must use the administrator audit logging.