Exchange: Mailbox and Database Storage Statistics PowerShell Export

Bear in mind this is version 1 so there aren't any variables to pass into yet. I'd like to get this a little more modular so you would adjust the command line instead of digging through the script for things like the mail server and such. Still, it does what I need it to. I'll highlight what you would need to update for your environment.

One tip for something I've done in the past. If you have SharePoint you can mail enable a library and email these to it. Then you capture the change in space over time so you know how your storage is changing. Plus it gets this valuable data out of your inbox.

This is particularly helpful when trying to right size your DBs and manage your various drives (typically it's best to put each DB on it's own drive letter).


#Gets mailbox statistics from specified mailbox server. Returns User, Size, Item Count, and which database the mailbox is in.


$MailboxStatsFileName="MailboxStats-" + $(get-date).tostring("MMddyyyy") + ".csv"
$MailboxStatsDeleteFileName="MailboxStats-" + $(get-date).adddays(-35).tostring("MMddyyyy") + ".csv"

Write-Output "Creating mailbox stats: $($MailboxStatsFileName)"
Get-MailboxStatistics -server ServerName | Select-Object DisplayName,@{label=”User”;expression={$_.LastLoggedOnUserAccount}},@{label=”Total Size(MB)”;expression={$_.TotalItemSize.Value.ToMB()}},ItemCount,Database | Export-CSV "C:\Reports\$($MailboxStatsFileName)"

#Pause to allow time for export
Start-Sleep 20

function Get-DatabaseStatistics {
    $Databases = Get-MailboxDatabase -Status
    foreach($Database in $Databases) {
        $DBSize = $Database.DatabaseSize
        $MBCount = @(Get-MailboxStatistics -Database $Database.Name).Count
$MBAvg = Get-MailboxStatistics -Database $Database.Name |
          %{$_.TotalItemSize.value.ToMb()} |
            Measure-Object -Average           
New-Object PSObject -Property @{
            Server = $Database.Server.Name
            DatabaseName = $Database.Name
            LastFullBackup = $Database.LastFullBackup
            MailboxCount = $MBCount
            "DatabaseSize (GB)" = $DBSize.ToGB()
            "AverageMailboxSize (MB)" = $MBAvg.Average
            "WhiteSpace (MB)" = $Database.AvailableNewMailboxSpace.ToMb()
        }
    }
}


#Runs function to gather server/database stats including whitespace
$DBFileName="DBStats-" + $(get-date).tostring("MMddyyyy") + ".csv"
$DBDeleteFileName="DBStats-" + $(get-date).adddays(-35).tostring("MMddyyyy") + ".csv"

Write-Output "Creating DB stats: $($DBFileName)"
Get-DatabaseStatistics | Export-Csv "C:\Reports\$($DBFileName)" -Force -NoType

#Pause to allow time for export
Start-Sleep 15

Write-Output "Emailing: $($MailboxStatsFileName) and $($DBFileName) to sys admins"
#Send email to admins with report info for mailboxes and databases.
Send-MailMessage -To email@company.com -From Exchange@Company.com -Subject "Email Statistics for $((get-date).ToShortDateString())" -SmtpServer mail.company.com -Attachments "C:\Reports\$($MailboxStatsFileName)", "C:\Reports\$($DBFileName)"


if (test-path -Path "C:\Reports\$($MailboxStatsDeleteFileName)")
{
  Write-Output "Deleting Old Mailbox Stats"
  Remove-Item -Path "C:\Reports\$($MailboxStatsDeleteFileName)" -ErrorAction SilentlyContinue
}

if (test-path -Path "C:\Reports\$($DBDeleteFileName)")
{
  Write-Output "Deleting Old DB Stats"
  Remove-Item -Path "C:\Reports\$($DBDeleteFileName)" -ErrorAction SilentlyContinue
}