How to run an extended message trace in Exchange Online (Microsoft 365)
Learn how to run a quick extended message trace in Exchange Online.
UPDATE: The message trace's layout slightly changed in 2025, but the steps to run an extended message trace are very similar.
Extended message trace is the ultimate email diagnostic tool for Microsoft 365. It lets you learn what exactly happened to an email. A few common reasons to run it:
Run email diagnostics on messages received more than 10 days ago.
See what might have affected your deliverability.
Learn why a message bounced.
See all the connectors and mailbox rules that took part in email processing.
Take a look at IP addresses of the client and servers involved im message transport.
If you want to learn how to get a message ID of an email, see our guide: https://www.codetwo.com/kb/messageid/
The direct link to a message trace wizard: https://admin.cloud.microsoft/exchang...
If you want to learn more about message tracing in Microsoft 365, read our article on the subject: https://www.codetwo.com/admins-blog/m... For more useful technical content, go to https://www.codetwo.com/admins-blog
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