You probably are familiar with the issue.
You created multiple distribution groups , over the years and now you don’t know if they are in use.

Usualy company uses half of available distribution lists.

So how you can trace it ?

In exchange 2007 follow this.

Get-MessageTrackingLog -Start 1/1/2009 -EventID Expand | ft Timestamp,RelatedRecipientAddress -Autosize

You get back something like this:The output shows when specific distribution group received last message.

Timestamp RelatedRecipientAddress
——— ———————–
1/11/2008 2:06:21 PM DG-Doctors@domainname.com

Now we need to check how many emails each group has

Get-MessageTrackingLog -Start 1/1/2009 -EventId Expand | group-object RelatedRecipientAddress | ft Name,Count -Autosize

You’ll receive something similar to this

Name Count
—- —–
Doctors@domainname.com 347

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