New-DkimSigningConfig

The AdminDisplayName parameter specifies a description for the policy. If the value contains spaces, enclose the value in quotation marks (").

The BodyCanonicalization parameter specifies the canonicalization algorithm that's used to create and verify the message body part of the DKIM signature. This value effectively controls the sensitivity of DKIM to changes to the message body in transit. Valid values are:

• Relaxed: Changes in whitespace and changes in empty lines at the end of the message body are tolerated. This is the default value.
• Simple: Only changes in empty lines at the end of the message body are tolerated.

The Confirm switch specifies whether to show or hide the confirmation prompt. How this switch affects the cmdlet depends on if the cmdlet requires confirmation before proceeding.

• Destructive cmdlets (for example, Remove-* cmdlets) have a built-in pause that forces you to acknowledge the command before proceeding. For these cmdlets, you can skip the confirmation prompt by using this exact syntax: -Confirm:$false.
• Most other cmdlets (for example, New-* and Set-* cmdlets) don't have a built-in pause. For these cmdlets, specifying the Confirm switch without a value introduces a pause that forces you acknowledge the command before proceeding.

The DomainName parameter specifies the domain in your organization that you want to enable DKIM message signing for.

By default, DKIM message signing is enabled for the initial *.onmicrosoft.com domain in the organization (for example, contoso.onmicrosoft.com).

For custom domains that don't have DKIM messaging signing enabled, the DKIM signatures for the *.onmicrosoft.com domain are added to messages.

The Enabled parameter specifies whether the policy is enabled. Valid values are:

• $true: The policy is enabled.
• $false: The policy is disabled.

The HeaderCanonicalization parameter specifies the canonicalization algorithm that's used to create and verify the message header part of the DKIM signature. This value effectively controls the sensitivity of DKIM to changes to the message headers in transit. Valid values are:

• Relaxed: Common modifications to the message header are tolerated (for example, Header field line rewrapping, changes in unnecessary whitespace or empty lines, and changes in case for header fields). This is the default value.
• Simple: No changes to the header fields are tolerated.

The KeySize parameter specifies the size in bits of the public key that's used in the DKIM signing policy. Valid values are:

• 1024 (this is the default value)
• 2048

RSA keys are supported. Ed25519 keys aren't supported.

The WhatIf switch simulates the actions of the command. You can use this switch to view the changes that would occur without actually applying those changes. You don't need to specify a value with this switch.