Power Shell to compile report for last access date for all mailboxes in organization. $users = Get-Mailbox -ResultSize unlimited $mailboxstats = $users | Get-MailboxStatistics $mailboxstats | select displayname,lastlogontime,lastloggedonuseraccount | Export-Csv -NoTypeInformation -Path C:\temp\*.csv –Force If you would like to know from Mailbox server point of view and target just one server. Get-MailboxStatistics -server Mailbox Server |sort lastlogonTime -Descending >c:\Avi.txt If you would like to target database you certainly do it. Get-MailboxStatistics -Database "Mailbox Database"