Set-ArcConfig

Set-ArcConfig
    [-Identity] <HostedConnectionFilterPolicyIdParameter>
    -ArcTrustedSealers <String[]>
    [-Confirm]
    [-WhatIf]
    [<CommonParameters>]

Services that modify message content in transit before delivery can invalidate DKIM email signatures and affect the authentication of the message. These services can use ARC to provide details of the original authentication before the modifications occurred. Your organization can then trust these details to help authenticate the message.

You need to be assigned permissions before you can run this cmdlet. Although this article lists all parameters for the cmdlet, you might not have access to some parameters if they aren't included in the permissions assigned to you. To find the permissions required to run any cmdlet or parameter in your organization, see Find the permissions required to run any Exchange cmdlet.

Set-ArcConfig -Identity Default -ArcTrustedSealers fabrikam.com

This example configures "fabrikam.com" as the only trusted ARC sealer in the organization.

$DomainsAdd = @(Get-ArcConfig | select -Expand ArcTrustedSealers)

$DomainsAdd += "cohovineyard.com","tailspintoys.com"

Set-ArcConfig -Identity Default -ArcTrustedSealers $DomainsAdd

This example adds the trusted ARC sealers "cohovineyard.com" and "tailspintoys.com" without affecting the other trusted ARC sealer entries.

$x = @(Get-ArcConfig | select -Expand ArcTrustedSealers)

$y = $x.Split(",")

$DomainsRemove = [System.Collections.ArrayList]($y)

$DomainsRemove

$DomainsRemove.RemoveAt(6)

Set-ArcConfig -Identity Default -ArcTrustedSealers $DomainsRemove

This example modifies the trusted ARC sealers list by removing an existing ARC sealer without affecting other ARC sealers that are already specified.

The first four commands return the existing list of ARC sealers. The first ARC sealer in the list has the index number 0, the second has the index number 1, and so on. Use the index number to specify the ARC sealer that you want to remove.

The last two commands remove the seventh ARC sealer that's displayed in the list.

$arcSealer = 'fabrikam.com'
$x = @(Get-ArcConfig | Select-Object -Expand ArcTrustedSealers)

$y = @($x.Split(","))
$DomainsRemove = [System.Collections.ArrayList]($y)
$DomainsRemove.Remove($arcSealer)

if ($DomainsToRemove.Count -eq 0) {
   Set-ArcConfig -Identity Default -ArcTrustedSealers " "
   }
else {
   Set-ArcConfig -Identity Default -ArcTrustedSealers $DomainsRemove
   }

This example removes the specified ARC sealer from the list ($arcSealer).

If no other ARC sealers exist after removing this entry from the list, using the value " " for the ArcTrustedSealers parameter avoids a bind argument error if the $DomainsToRemove value is empty.

This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutBuffer, -OutVariable, -PipelineVariable, -ProgressAction, -Verbose, -WarningAction, and -WarningVariable. For more information, see about_CommonParameters.