Commands › Exchange Online

New-AcceptedDomain

Exchange Online ExchangeOnlineManagement New-*

Create an accepted domain in your organization. An accepted domain is any SMTP namespace for which an Exchange organization sends and receives email.

Quick start script

# New-AcceptedDomain — 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-AcceptedDomain
$before | Format-List

# 3. Make the change (dry run first)
New-AcceptedDomain -Name <String> -DomainName <SmtpDomainWithSubdomains> -WhatIf
New-AcceptedDomain -Name <String> -DomainName <SmtpDomainWithSubdomains>

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

Syntax

New-AcceptedDomain [-Name] <String> -DomainName <SmtpDomainWithSubdomains>
 [-Confirm]
 [-DomainController <Fqdn>]
 [-DomainType <AcceptedDomainType>]
 [-WhatIf]
 [<CommonParameters>]

Parameters (6)

Parameter	Type	Required	What it controls
-Name	String	yes	The Name parameter specifies a unique name for the accepted domain object.
-DomainName	SmtpDomainWithSubdomains	yes	The DomainName parameter specifies the SMTP domain that you want to establish as an accepted domain. Valid input for the DomainName parameter is an SMTP domain. You can use a wildcard character to specify all...
-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...
-DomainType	AcceptedDomainType		The DomainType parameter specifies the type of accepted domain that you want to configure. Valid values are Authoritative, InternalRelay or ExternalRelay. You must set at least one value.
-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.