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M365 Changelog: Exchange - Test-Message coming soon

Rabia Noureen


MC503297 – Microsoft is introducing a cmdlet called Test-Message that tenant admins can use to independently investigate issues related to the processing of their Exchange Transport Rules (ETRs) and Unified DLP rules without having to engage Microsoft support for assistance.

This message is associated with Microsoft 365 Roadmap ID 100494

When this will happen:

Standard Release: Microsoft will begin rolling out in late January and expect to complete by mid-February.

How this will affect your organization:

When you want to determine why an ETR didn’t trigger or work as expected, you can use the Test-Message cmdlet to investigate the root cause without asking Microsoft support to help investigate. Tenant admins can run Test-Message to simulate test email messages and get an evaluation report that shows what rules matched/didn’t match for a particular message. 

What you need to do to prepare:

There is nothing you need to do to prepare for this. Once the cmdlet is available to your tenant, you can run Test-Message with the appropriate parameters. For example:

Test-Message -Sender [email protected] -Recipients [email protected] -SendReportTo [email protected] -TransportRules -Organization

Additional information


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