HOTSPOT
Your company has an Exchange Server 2013 organization.
You configure domain security with a partner organization.
You configure the required connectors.
You plan to verify whether the partner organization configured the required settings for domain
security.
You enable logging for the Send connectors and the Receive connectors.
You need to verify that the STARTTLS command is issued by an Exchange server when an email
message is sent to the partner organization.
Which log folder should you review? (To answer, select the appropriate folder in the answer area.)
Answer: 
C:\Program Files\Microsoft\Exchange Server\V15\TransportRoles\Logs\HUB\ProtocolLog
The file path for send and receive logs is:
C:\Program Files\Microsoft\Exchange Server\V15\TransportRoles\Logs\HUB\ProtocolLog
The file path “C:\Program Files\Microsoft\Exchange Server\V15\TransportRoles\Logs\ProtocolLog” is for HTTP Client logs