Commands › Exchange Online

Set-ArcConfig

Exchange Online ExchangeOnlineManagement Set-*

Modify the list of trusted Authenticated Received Chain (ARC) sealers that are configured in the cloud-based organization.

Quick start script

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

# 3. Make the change (dry run first)
Set-ArcConfig -Identity <HostedConnectionFilterPolicyIdParameter> -ArcTrustedSealers <String[]> -WhatIf
Set-ArcConfig -Identity <HostedConnectionFilterPolicyIdParameter> -ArcTrustedSealers <String[]>

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

Syntax

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

Parameters (4)

Parameter	Type	Required	What it controls
-Identity	HostedConnectionFilterPolicyIdParameter	yes	The Identity parameter specifies the trusted ARC sealers list that you want to modify. Use one of the following values:
-ArcTrustedSealers	String[]	yes	The ArcTrustedSealers parameter specifies the domain name of the ARC sealers that you want to add.
-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.
-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.