CmdID / PowerShell / Cmdlets / Remove
Remove-FederationTrust
Use the Remove-FederationTrust cmdlet to remove an existing federation trust from an Exchange organization. Exchange PowerShell reference
From the Exchange PowerShell reference 4 parameters Its page in the reference
Parameters
-IdentityThe Identity parameter specifies the identity of the federation trust being removed.-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.-DomainControllerThe DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory.-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.