Message Tracking problem in Exchange 2016

Dear Wizards, I got this EventID when tracking the mail from Sender to Recipient in the same domain: (MS Exchange 2016)

Timestamp              EventId          Source        Sender                Recipients            MessageSubject       
---------              -------          ------        ------                ----------            --------------       
4/13/2018 11:31:02 AM  HAREDIRECTFAIL   SMTP          thinh.v@xxx.com  {hai.tm@xxx.com} FW: LAM    
4/13/2018 11:31:03 AM  RECEIVE          SMTP          thinh.v@xxx.com  {hai.tm@xxx.com} FW: LAM  
4/13/2018 11:31:03 AM  AGENTINFO        AGENT         thinh.v@xxx.com  {hai.tm@xxx.com} FW: LAM     
4/13/2018 11:31:03 AM  SEND             SMTP          thinh.v@xxx.com  {hai.tm@xxx.com} FW: LAM  

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What is HAREDIRECTFAIL ? In this log, can we confirm that the message was delivered or not? If not, how can we confirm that? Many thanks!