Which task can you perform to determine where each message was lost?

After deploying a Cisco ESA on your network, you notice that some messages fail to reach their destinations .

Which task can you perform to determine where each message was lost?
A . Configure the trackingconfig command to enable message tracking.
B . Generate a system report.
C . Review the log files.
D . Perform a trace.

Answer: A

Explanation:

Message tracking helps resolve help desk calls by giving a detailed view of message flow. For example, if a message was not delivered as expected, you can determine if it was found to contain a virus or placed in a spam quarantine ― or if it is located somewhere else in the mail stream.

Reference: https://www.cisco.com/c/en/us/td/docs/security/esa/esa12-0/user_guide/b_ESA_Admin_Guide_12_0/b_ESA_Admin_Guide_12_0_chapter_011110.html