Tag: Message trace data

This article covers how to use Exchange Online message trace data to find inactive mailboxes based on their message send activity. The script processes user mailboxes but can easily be adapted to process shared mailboxes too. This is only one of the available methods to find inactive mailboxes. The other methods mentioned in the article might be better suited to your purpose.

After writing a previous article about using PowerShell to analyze message trace data, I was asked about analyzing user (or mailbox) sending patterns to discover who’s sending email and where they’re sending messages to. As in many similar situations, PowerShell is a great tool to use because of its flexibility. This article explains how to generate a per-mailbox report of how many messages are sent and the percentage of internal versus external, plus the external domains the email goes to.