Office 365: Make IT shared mailbox and forward

Connect-ExchangeOnline
$primaryDomain = (Get-AcceptedDomain | Where-Object { $_.Default -eq $true }).Name
$itEmail = "IT@$primaryDomain"
New-Mailbox -Shared -Name "IT" -PrimarySmtpAddress $itEmail
Set-Mailbox -Identity $itEmail -ForwardingSmtpAddress "mikopia@mikopia.com" -DeliverToMailboxAndForward $true
Enable-OrganizationCustomization
Set-HostedOutboundSpamFilterPolicy -Identity Default -AutoForwardingMode On