Set-OutboundConnector — usage, script and reference

Quick start script

# Set-OutboundConnector — 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-OutboundConnector
$before | Format-List

# 3. Make the change (dry run first)
Set-OutboundConnector -Identity <OutboundConnectorIdParameter> -WhatIf
Set-OutboundConnector -Identity <OutboundConnectorIdParameter>

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

Syntax

Set-OutboundConnector [-Identity] <OutboundConnectorIdParameter>
 [-AllAcceptedDomains <Boolean>]
 [-CloudServicesMailEnabled <Boolean>]
 [-Comment <String>]
 [-Confirm]
 [-ConnectorSource <TenantConnectorSource>]
 [-ConnectorType <TenantConnectorType>]
 [-Enabled <Boolean>]
 [-IsTransportRuleScoped <Boolean>]
 [-IsValidated <Boolean>]
 [-LastValidationTimestamp <DateTime>]
 [-MtaStsMode <MtaStsMode>]
 [-Name <String>]
 [-RecipientDomains <MultiValuedProperty>]
 [-RouteAllMessagesViaOnPremises <Boolean>]
 [-SenderRewritingEnabled <Boolean>]
 [-SmartHosts <MultiValuedProperty>]
 [-SmtpDaneMode <SmtpDaneMode>]
 [-TestMode <Boolean>]
 [-TlsDomain <SmtpDomainWithSubdomains>]
 [-TlsSettings <TlsAuthLevel>]
 [-UseMXRecord <Boolean>]
 [-ValidationRecipients <String[]>]
 [-WhatIf]
 [<CommonParameters>]

Parameters (24)

Parameter	Type	Required	What it controls
-Identity	OutboundConnectorIdParameter	yes	The Identity parameter specifies the connector you want to modify. You can use any value that uniquely identifies the connector. For example:
-AllAcceptedDomains	Boolean		The AllAcceptedDomains parameter specifies whether the Outbound connector is used in hybrid organizations where message recipients are in accepted domains of the cloud-based organization. Valid values are:
-CloudServicesMailEnabled	Boolean		Note: We recommend that you don't use this parameter unless you are directed to do so by Microsoft Customer Service and Support, or by specific product documentation. Instead, use the Hybrid Configuration wizard...
-Comment	String		The Comment parameter specifies an optional comment. If you specify a value that contains spaces, enclose the value in quotation marks ("), for example: "This is an admin note".
-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.
-ConnectorSource	TenantConnectorSource		The ConnectorSource parameter specifies how the connector is created. Valid values are:
-ConnectorType	TenantConnectorType		The ConnectorType parameter specifies a category for the domains that are serviced by the connector. Valid values are:
-Enabled	Boolean		The Enabled parameter specifies whether to enable or disable the Outbound connector. Valid values are:
-IsTransportRuleScoped	Boolean		The IsTransportRuleScoped parameter specifies whether the Outbound connector is associated with a transport rule (also known as a mail flow rule). Valid values are:
-IsValidated	Boolean		The IsValidated parameter specifies whether the Outbound connector is validated. Valid values are:
-LastValidationTimestamp	DateTime		The LastValidationTimestamp parameter specifies the date/time that the Outbound connector was validated.
-MtaStsMode	MtaStsMode		The MtaStsMode parameter provides admin control over outbound MTA Strict Transport Security (MTA-STS) validation for email sent over the outbound connector. Organizations can choose how strictly to enforce MTA-STS...
-Name	String		The Name parameter specifies the unique name for the connector. The maximum length is 64 characters. If the value contains spaces, enclose the value in quotation marks (").
-RecipientDomains	MultiValuedProperty		The RecipientDomains parameter specifies the domain that the Outbound connector routes mail to. You can specify multiple domains separated by commas.
-RouteAllMessagesViaOnPremises	Boolean		The RouteAllMessagesViaOnPremises parameter specifies that all messages serviced by this connector are first routed through the on-premises email system. Valid values are:
-SenderRewritingEnabled	Boolean		The SenderRewritingEnabled parameter specifies that all messages that normally qualify for SRS rewriting are rewritten for routing through the on-premises email system. Valid values are:
-SmartHosts	MultiValuedProperty		The SmartHosts parameter specifies the smart host that the Outbound connector uses to route mail. Valid values are:
-SmtpDaneMode	SmtpDaneMode		The SmtpDaneMode parameter provides admin control over outbound SMTP DNS-based Authentication of Named Entities (DANE) validation for email sent over the outbound connector. Organizations can choose how strictly to...
-TestMode	Boolean		The TestMode parameter specifies whether you want to enabled or disable test mode for the Outbound connector. Valid values are:
-TlsDomain	SmtpDomainWithSubdomains		The TlsDomain parameter specifies the domain name that the Outbound connector uses to verify the FQDN of the target certificate when establishing a TLS secured connection. A valid value for this parameter is an SMTP domain.
-TlsSettings	TlsAuthLevel		The TlsSettings parameter specifies the TLS authentication level that's used for outbound TLS connections established by this Outbound connector. Valid values are:
-UseMXRecord	Boolean		The UseMXRecord parameter enables or disables DNS routing for the connector. Valid values are:
-ValidationRecipients	String[]		The ValidationRecipients parameter specifies the email addresses of the validation recipients for the Outbound connector. You can specify multiple email addresses separated by commas.
-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.