Exchange 2007 mailbox command

MS Exchange Org

Mailbox Statistics Commands

1. Basics

The most basic Exchange Management Shell cmdlet to use is the Get-MailboxStatistics cmdlet on its own. Figure 1 shows a sample of the output of running this cmdlet with no additional parameters. This runs against the local mailbox server.


cmdlet the Format-List cmdlet, or fl for short

Get-MailboxStatistics | fl

the Format-Table cmdlet, or ft for short

Get-MailboxStatistics | ft DisplayName,TotalItemSize,ItemCount

2. Formatting
Let’s address the order of the output first. Sorting objects using PowerShell is really easy via the, you guessed it, Sort-Object cmdlet. All you really need to do for this exercise is to get the mailbox statistics and then pipe the results into the Sort-Object cmdlet before piping these results into the Format-Table cmdlet. For the Sort-Object cmdlet, all we really need to decide is which column you want to sort on and the direction you want to sort in. The first parameter we need to add to Sort-Object is the column name to sort on, which in our case is TotalItemSize. We then add either –Descending or –Ascending to give us the direction to sort in. Let’s show the largest mailboxes first, which is typically what administrators need to know. The cmdlet now becomes:

Get-MailboxStatistics | Sort-Object TotalItemSize –Descending | ft DisplayName,TotalItemSize,ItemCount

Next we need to convert the mailbox sizes from bytes into something more useful. Megabytes is the obvious answer although with the ever increasing mailbox sizes it will not be long before gigabytes will be used as the default. However, since on my test system I have only got relatively small mailbox sizes, I am going to display the mailbox sizes in kilobytes. To do this, we need to replace the TotalItemSize parameter in our cmdlet with something inherently more complicated:

@{ expression={$_.TotalItemSize.Value.ToKB()}}
So our cmdlet now looks like this:
Get-MailboxStatistics | Sort-Object TotalItemSize –Descending | ft DisplayName,@{ expression={$_.TotalItemSize.Value.ToKB()}},ItemCount

to display the mailbox sizes in MB, use TotalItemSize.Value.ToMB in the cmdlet above. Or you can use TotalItemSize.Value.ToGB

That’s looking much better. But wait! Look at the column names now. We can see that the column that was previously called TotalItemSize is now referenced in the rather cumbersome form of $_.TotalItemSize.Value.ToKB(). We can address that very easily by adding a new label to the cmdlet. In fact, all you need to do is to add a change to the cmdlet to re-label the column appropriately. The new cmdlet is shown below:

Get-MailboxStatistics | Sort-Object TotalItemSize -Descending | ft DisplayName,@{label=”TotalItemSize(KB)”;expression={$_.TotalItemSize.Value.ToKB()}},ItemCount

3. Emailing The Results

###Send mailbox statistics script

###First, the administrator must change the mail message values in this section
$FromAddress =
$ToAddress =
$MessageSubject = “Mailbox Size Report”
$MessageBody = “Attached is the current list of mailbox sizes.”
$SendingServer = “”

###Now get the stats and store in a text file
Get-MailboxStatistics | Sort-Object TotalItemSize -Descending | ft
ItemCount > mailboxes.txt

###Create the mail message and add the statistics text file as an attachment
$SMTPMessage = New-Object System.Net.Mail.MailMessage $FromAddress, $ToAddress,
$MessageSubject, $MessageBody
$Attachment = New-Object Net.Mail.Attachment(“./mailboxes.txt”)

###Send the message
$SMTPClient = New-Object System.Net.Mail.SMTPClient $SendingServer

To run the Exchange Management Shell and also specify the script to run. This can be achieved by the following command:

PowerShell.exe -PSConsoleFile “C:Program FilesMicrosoftExchange ServerBinExShell.psc1” -Command “./sendstats.ps1”