Mail did not received by a user

[P_T_Ashraf]

We found a strange behavior in our exchange server.  Once user sent an email via Outlook and sent items updated . There is no bounce message received by user. But unfortunately the recipient did not received the email . Also there is no log in the exchange server.

What happened to these emails and what may be reason  

[#2]

Hi @P_T_Ashraf 

try to run a message trace on the affected user to see the message status is it still in your server or goes to the intended recipient

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