The Message Trace in Exchange Admin Center allows one to check the status of messages that were sent to a specific recipient or sent from a specific sender. It shows whether messages were successfully delivered or not.
In order to get to Message Trace, one would have to select the mail flow option from the left navigation and then click on Message Trace from the top navigation.
The Figure above shows how the fields/criteria for Message Trace looks like.
One must note that it would also show emails delivered to the Junk Folder. In that case the status would show Filtered for Spam.