Get-Mailbox –Resultsize Unlimited | Get-MailboxStatistics | Sort LastLogonTime | select Displayname, lastlogontime
you can export to .csv
Get-Mailbox –Resultsize Unlimited | Get-MailboxStatistics | Sort LastLogonTime | select Displayname, lastlogontime | Export-CSV -Path d:\Mailbox-Logon-Report.csv -NoTypeInformation
Add additional properties to select statement as required.
I've done it already using the Powershell script below:
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But how to know if the mailbox is still in use or not ?