Your Exchange Server 2007 organization contains two Exchange servers. The roles on the two servers are configured as shown in the following table.

Two users named Marc and Maria have mailboxes on ExchMb1. Marcs computer is on segment A . Marias computer is on segment B. The Exchange servers are on segment C . Marc sends a message to Maria. The message leaves Marcs Outbox and is listed in his Sent Items folder. However, the message is never delivered to Maria’s mailbox.
You need to find out the most likely cause of the problem. What should you do?

A.
On ExchMb1, run the Test-ServiceHealth cmdlet.

B.
On ExchHub1, run the Test-ServiceHealth cmdlet.

C.
On ExchMb1, run the Test-MAPIConnectivity -Server ExchMb1 cmdlet.

D.
On a computer on segment A, run the Test-MAPIConnectivity -Server ExchMb1 cmdlet.