TMA-M365-DKIM-ENABLED

Ensure DKIM signing is enabled for all Exchange Online domains

보통레벨 1자동m365

설명

DKIM signatures let receivers verify mail really came from your domains and are a prerequisite for an enforcing DMARC policy. Prints the number of domains whose DKIM signing configuration is not enabled (expected 0). Requires an already-connected Exchange Online session: Install-Module ExchangeOnlineManagement; Connect-ExchangeOnline (View-Only Organization Management is sufficient). The audit throws if no session exists.

점검 방법

감사 방식: 셸 명령

shell

$ErrorActionPreference = 'Stop'; if (-not (Get-Command Get-ConnectionInformation -ErrorAction SilentlyContinue) -or -not (Get-ConnectionInformation)) { throw 'Not connected: run Connect-ExchangeOnline first' }; $bad = @(Get-DkimSigningConfig -ErrorAction Stop | Where-Object { $_.Enabled -ne $true }); $bad.Count

예상 출력: 0

조치 방법

조치 방식: 가이드 또는 인프라 패치

Publish the selector1/selector2 CNAME records shown by Get-DkimSigningConfig -Identity <domain> | Format-List Selector*CNAME, then New-DkimSigningConfig -DomainName <domain> -Enabled $true or Set-DkimSigningConfig -Identity <domain> -Enabled $true.

속성

운영 체제: 모두
태그: m365mail-auth
참고 자료: CIS Microsoft 365 Foundations Benchmark v7.0.0 - Exchange Online / DKIM (verify section number for your release)

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감사 권한이 있는 시스템에서 실행하세요. 스캔은 읽기 전용입니다.

shell

tmaegis scan --target m365