Tag: Exchange Online message trace

This article describes how to use PowerShell to extract and analyze Exchange Online message trace data to figure out the volume of traffic to outbound domains and from inbound domains. You might think that this is the same information as available in the Exchange admin center mail flow report, but it’s not. Once again, the value of PowerShell in retrieving and using data is evident.

Exchange Online historical searches are the way to retrieve message trace information that’s older than 10 days (but less than 90 days). You might not have to run historical searches very often, but when you need to, you’ll be glad that the facility exists.