SELECT MailContacts,RecipientCount,DistributionGroups,MailboxCount
FROM OpenExchangePSQuery(
    POWERSHELL, '
    $MailContacts = (Get-MailContact -ResultSize Unlimited).count
    $Recipients = (Get-Recipient -Resultsize Unlimited).count
    $DG = (Get-DistributionGroup -ResultSize Unlimited).count
    $Mailboxes = (Get-Mailbox -ResultSize Unlimited).count

$Result = New-Object PSObject -Property @{
MailContacts = $MailContacts
RecipientCount = $Recipients
DistributionGroups = $DG
MailboxCount = $Mailboxes
}

$Result | Select MailContacts,RecipientCount,DistributionGroups,MailboxCount

              ', POWERSHELL
)