Build a custom table in Powershell that includes mailbox count

Scenario:  You want to build a custom table to include the MailboxCount and other elements of the Get-ExchangeServer command.

$exchangeservers = Get-ExchangeServer | Where AdminDisplayVersion -like "*15*"

$final = @()

$Exchangeservers | %{

#Put the Server Name into a Variable
$server = $_.Name

#Grab the Mailbox Count Per server
$MBXCount = (Get-mailbox -server $_.Name).Count

#Version of Exchange
$AdminDisplayVersion = $_.AdminDisplayVersion

Write-Host "Checking $server"

#Grab the InstallPath
$ExchangeInstallPath = $null

$ExchangeInstallPath = Invoke-Command –Computername $server -ScriptBlock {$env:ExchangeInstallPath} -ErrorAction STOP

#Build the Array
 $ServerObj = New-Object PSObject
 $ServerObj | Add-Member NoteProperty -Name "ServerName" -Value $server
 $ServerObj | Add-Member NoteProperty -Name "InstallPath" -Value $ExchangeInstallPath
 $ServerObj | Add-Member NoteProperty -Name "MBXCount" -value $MBXCount
 $ServerObj | Add-Member NoteProperty -Name "Version" -value $AdminDisplayVersion
    $Final += $ServerObj    
}
$Final