Remember that you need to “Set-ExecutionPolicy RemoteSigned” in the Task Scheduler for the PS script to run correctly. Also, if you are going to run this PS script on a remote server you may need to add the MSExchange PS Snappin. To do this just add “Add-PSSnapin Microsoft.Exchange.Management.PowerShell.Admin” to the first line of the script. You obviously need to change the mail server and recipient options.

Here’s the script download EmailMailboxSizeReport.ps1

And a break down of the script:

#Firstly, get the users mailbox… ONLY objects that are UserMailbox and not HiddenFromAddressListsEnabled
$MailboxUser = Get-Mailbox | Where {($_.RecipientType -eq “UserMailbox”) -and ($_.HiddenFromAddressListsEnabled -eq $False)}

#Secondly, get the mailbox statistics for the selected users. Some formatting also
$MessageBody = $MailboxUser | Get-MailboxStatistics | Sort-Object TotalItemSize | Select DisplayName, ItemCount, @{Expression={$_.TotalItemSize.Value.ToMB()};Name=”MailboxSize MB”} | ConvertTo-html

#Finally, enter your mail server details
$FromAddress = “FromAddress@YourDomain.com”
$ToAddress = “ToAddress@YourDomain.com”
$MessageSubject = “PowerShell Report Subject”
$SendingServer = “YourMailServerAddress”
$SMTPMessage = New-Object System.Net.Mail.MailMessage $FromAddress, $ToAddress, $MessageSubject, $MessageBody
$SMTPMessage.IsBodyHtml = $true
$SMTPClient = New-Object System.Net.Mail.SMTPClient $SendingServer
$SMTPClient.Send($SMTPMessage)

#Written by Matt Shadbolt
#http://www.mattlog.net