CmdID / PowerShell / Cmdlets / Get
Get-TransportPipeline
Use the Get-TransportPipeline cmdlet to view transport agents and the SMTP event where the transport agent is registered. Exchange PowerShell reference
From the Exchange PowerShell reference 1 parameter Its page in the reference
Parameters
-DomainControllerThe DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory.