An Engineers Notebook

How to find inactive or unused mailboxes in Exchange

This is really easy:
In PowerShell run:
Get-StaleMailBoxReport

If you want this in an excel file just pipe it out like this:
Get-StaleMailBoxReport | Export-CSV -Path C:staleMBs.csv

We can get a more detailed report with the following cmdlet:
Get-StaleMailboxDetailReport

Get-StaleMailboxDetailReport | Export-CSV -Path C:DetailedstaleMBs.csv

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