CmdID / PowerShell / Cmdlets / Add
Add-FederatedDomain
Use the Add-FederatedDomain cmdlet to configure a secondary domain with the federated organization identifier in the federation trust for the Exchange organization. Exchange PowerShell reference
From the Exchange PowerShell reference 5 parameters Its page in the reference
Parameters
-IdentityThis parameter is reserved for internal Microsoft use.-DomainNameThe DomainName parameter specifies the secondary domain to be configured.-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.