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Applies to: Exchange Server 2013

This cmdlet is available only in on-premises Exchange Server 2013.

Use the Add-FederatedDomain cmdlet to configure a secondary domain with the federated organization identifier in the federation trust for the Exchange organization.

The domains being added to the federation trust must exist as accepted domains in the Exchange organization.

For information about the parameter sets in the Syntax section below, see Syntax.

Add-FederatedDomain -DomainName <SmtpDomain> [-Identity <OrganizationIdParameter>] [-Confirm [<SwitchParameter>]] [-DomainController <Fqdn>] [-WhatIf [<SwitchParameter>]]

This example adds the domain Contoso.co.uk to the existing federation trust.

Add-FederatedDomain -DomainName Contoso.co.uk

You can add any registered Internet domain to the federated organization identifier. You must prove domain ownership by creating a TXT record in the Domain Name System (DNS) zone of each domain you add.

For more details, see Federation.

You need to be assigned permissions before you can run this cmdlet. Although all parameters for this cmdlet are listed in this topic, you may not have access to some parameters if they're not included in the permissions assigned to you. To see what permissions you need, see the "Federation trusts" entry in the Exchange and Shell infrastructure permissions topic.


Parameter Required Type Description




The DomainName parameter specifies the secondary domain to be configured.




The Confirm switch can be used to suppress the confirmation prompt that appears by default when this cmdlet is run. To suppress the confirmation prompt, use the syntax -Confirm:$False. You must include a colon ( : ) in the syntax.




The DomainController parameter specifies the fully qualified domain name (FQDN) of the domain controller that writes this configuration change to Active Directory.




The Identity parameter is reserved for internal Microsoft use.




The WhatIf switch instructs the command to simulate the actions that it would take on the object. By using the WhatIf switch, you can view what changes would occur without having to apply any of those changes. You don't have to specify a value with the WhatIf switch.

To see the input types that this cmdlet accepts, see Cmdlet Input and Output Types. If the Input Type field for a cmdlet is blank, the cmdlet doesn’t accept input data.

To see the return types, which are also known as output types, that this cmdlet accepts, see Cmdlet Input and Output Types. If the Output Type field is blank, the cmdlet doesn’t return data.

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