How to List Exchange 2007 Mailbox Sizes

To create a CSV file with mailboxes and their sizes in Exchange 2007, open the Exchange Management Shell and execute the following:

Get-MailboxStatistics -Database “Mailbox Database” | Select DisplayName, LastLoggedOnUserAccount, ItemCount, TotalItemSize, LastLogonTime, LastLogoffTime | Export-CSV test.csv

Same command with mailbox sizes in megabytes:

Get-MailboxStatistics -Database “Mailbox Database” | Format-Table DisplayName, LastLoggedOnUserAccount, ItemCount, @{expression={$_.totalitemsize.value.ToMB()};label=”Size(MB)”}, LastLogonTime, LastLogoffTime| Export-CSV test.csv

Same command sorted by mailbox size:

Get-MailboxStatistics -Database “Mailbox Database” | Sort -Property TotalItemsize | Format-Table DisplayName, LastLoggedOnUserAccount, ItemCount, @{expression={$_.totalitemsize.value.ToMB()};label=”Size(MB)”}, LastLogonTime, LastLogoffTime| Export-CSV test.csv