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The Get-MailboxStatistics cmdlet is great for showing a range of detailed information about the mailboxes in your organisation.  Sometimes you need to pare down the information to just the really useful stuff (such as mailbox size, item count, etc.) and push it to a CSV file.  Here’s one that I find helpful:


get-exchangeserver | where-object {$_.IsMailboxServer -eq $true } | `

Get-MailboxStatistics | Sort-Object TotalItemSize -Descending | `

Select-Object DisplayName,@{label="TotalItemSize(MB)";`


ItemCount,ServerName,StorageGroupName,DatabaseName | `

export-csv c:\stats.csv –NoTypeInformation


  1. Daniel ODonnell says:


    This looks really usefulbut I am unable to use the script as I get the following error:

    Select-Object : Illegal key label
    At line:3 char:14
    Select-Object <<<< DisplayName,@{label=”TotalItemSize(MB)”;`

    I am using powershell v1 with 2008 64 Bit Server.



  2. Tony Murray says:

    Hi Daniel

    It might be that the formatting has changed after copy/paste from the web site. I’ve just tried it and it works for me, but in the past I have seen situations where characters like double-quotes get transformed. Try replacing the special characters in that line manually and see if it works.


  3. ebuford says:

    This really is a great script.
    Thanks for taking the time to post it!

  4. www.zhengda.me says:

    when i changed the “lable” to “name”,it works.
    look below:

    or not it will report “Illegal key label”

    I am also using powershell v1 with 2008 64 Bit Server.



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