The Top Distribution Groups mail traffic report shows you which distribution groups are sending or receiving the most email in your Office 365 Environment over a given time period. You can select whether to show by number of emails (items) or size in MB through the button to the bottom right of the chart.
This allows you to track which Distribution Groups are heavily used in your Office 365 environment.
A distribution group “sends email” when someone has Send As rights to the group and uses the group as the Sender in an email.

By default, the report will show you the top receivers of email messages in the past 7 days.
You can change the time period using the Date Selection Tool above the graph.
Note: As we collect data every day for the previous 24 hours, data will be only available for the length of time you have been a Radar for Office 365 customer.  For example, if you started using the reporting application 30 days ago you will have access to 30 days worth of data.  This time period will increase the longer you use the product.

Alternatively, you can use the buttons below the graph to display the top senders of email instead of receivers.

The Data Table
The data table for this report shows you the number of messages sent and received by every mail enabled distribution group in your organisation during the period specified.

This report can naturally be customized, filtered, emailed and scheduled like all our other reports.

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