Mail flow rule PS help

PowerShell Help
1

Looking for some guidance on this one. The settings in the image are what I’d like to get done in PS

image
This is what I’ve got:
$Name = “Prevent auto forwarding of email to external domains”

$Notification = “Auto-forwarding email outside this organization is prevented for security reasons.”

New-TransportRule -Name $Name -GenerateNotification $notification -MessageTypeMatches “autoforward”

What are the sender and recipient locations? Also doesn’t looking like the -generationnotifcation is correctly matching to “reject the message with the explanation…”

Appreciate your assistance.

2

I’ll caveat this by saying that I’m not an Exchange admin and don’t have a M365 environment to test against. Looking at the help, something like this should work:

$TransportRuleParams = @{
    Name                    = 'Prevent auto-forwarding of e-mail to external domains'
    FromScope               = 'InOrganization'
    SentToScope             = 'NotInOrganization'
    MessageTypeMatches      = 'AutoForward'
    RejectMessageReasonText = 'Auto-forwarding email outside this organisation is prevented for security reasons.'
}

New-TransportRule @TransportRuleParams
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