Overview

Microsoft 365 offers a detailed way to trace emails via message trace. If you manage a Microsoft 365 environment for a client, this is an easy way to find why a message was not delivered or moved into the spam folder.

Instructions

Log into protection.office.com with Global Administrator username and password:
Once logged in, Click Mail flow on the left:
Then click Message Trace:
Once the new page loads, click Start a trace:
A window will slide over from the right:
In the first box enter the address that sent the email:
In the second box enter the address that received the email:
Set the time range the email was send or received:
(This is set to the last 2 days by default)
Select Summary report:
Now click Search.
Your message trace results are now shown:
Click on the relevant message to show more details:
You can click Message events to see further details of what happened to a message:
You can also click Submit message to submit feedback to Microsoft if the message was blocked as spam: