Ensure SMTP AUTH client submission is disabled organization-wide

높음레벨 1자동m365

설명

SMTP AUTH uses basic authentication and bypasses MFA; it should be disabled tenant-wide and enabled only per mailbox where unavoidable. 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' }; $t = Get-TransportConfig -ErrorAction Stop; if ($t.SmtpClientAuthenticationDisabled -eq $true) { 'compliant' } else { 'noncompliant' }

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Set-TransportConfig -SmtpClientAuthenticationDisabled $true (re-enable for individual devices with Set-CASMailbox <mbx> -SmtpClientAuthenticationDisabled $false).

속성

운영 체제: 모두
태그: m365authentication
참고 자료: CIS Microsoft 365 Foundations Benchmark v7.0.0 - Exchange Online / SMTP AUTH (verify section number for your release)

이 호스트 점검하기

감사 권한이 있는 시스템에서 실행하세요. 스캔은 읽기 전용입니다.

shell

tmaegis scan --target m365