Commands › Exchange Online

Remove-FederatedDomain

Exchange Online ExchangeOnlineManagement Remove-*

Remove a federated domain from the federated organization identifier in the federation trust for the Exchange organization. If you remove a domain configured for federated sharing, federated sharing for that domain is disabled. For more information, see Federation.

Quick start script

# Remove-FederatedDomain — quick start (serv365.ai)
# 1. Connect (app-only shown; interactive: omit the certificate parameters)
Connect-ExchangeOnline -CertificateThumbprint $thumb -AppId $appId -Organization $org

# 2. Capture the current state first — you cannot roll back what you never recorded
$before = Get-FederatedDomain
$before | Format-List

# 3. Make the change (dry run first)
Remove-FederatedDomain -DomainName <SmtpDomain> -WhatIf
Remove-FederatedDomain -DomainName <SmtpDomain>

# 4. Verify and diff
$after = Get-FederatedDomain
Compare-Object ($before | Out-String) ($after | Out-String)

Syntax

Remove-FederatedDomain [[-Identity] <OrganizationIdParameter>] -DomainName <SmtpDomain>
 [-Confirm]
 [-DomainController <Fqdn>]
 [-Force]
 [-WhatIf]
 [<CommonParameters>]

Parameters (6)

Parameter	Type	Required	What it controls
-Identity	OrganizationIdParameter		This parameter is reserved for internal Microsoft use.
-DomainName	SmtpDomain	yes	The DomainName parameter specifies the federated domain name to be removed from the federated organization identifier.
-Confirm	SwitchParameter		The Confirm switch specifies whether to show or hide the confirmation prompt. How this switch affects the cmdlet depends on whether the cmdlet requires confirmation before proceeding.
-DomainController	Fqdn		The DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory. You identify the domain controller by its fully qualified domain name...
-Force	SwitchParameter		The Force switch specifies whether to suppress warning or confirmation messages when removing a federated domain. You don't need to specify a value with this switch.
-WhatIf	SwitchParameter		The WhatIf switch shows what the command does without making any changes. You don't need to specify a value with this switch.

Reference facts derived from Microsoft documentation, © Microsoft, licensed CC BY 4.0; restructured with original guidance by serv365.ai.