Microsoft 365
TMA-M365-SMTP-AUTH-DISABLED
Ensure SMTP AUTH client submission is disabled organization-wide
HochStufe 1Automatisiertm365
Beschreibung
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.
So wird geprüft
Prüfmethode: Shell-Befehl
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' }- Erwartete Ausgabe
compliant
So wird behoben
Behebungsmethode: Anleitung oder Infrastruktur-Patch
Set-TransportConfig -SmtpClientAuthenticationDisabled $true (re-enable for individual devices with Set-CASMailbox <mbx> -SmtpClientAuthenticationDisabled $false).
Eigenschaften
- Betriebssysteme
- Beliebig
- Tags
- m365authentication
- Referenz
- CIS Microsoft 365 Foundations Benchmark v7.0.0 - Exchange Online / SMTP AUTH (verify section number for your release)
Diesen Host prüfen
Führen Sie dies auf einem Rechner aus, den Sie prüfen dürfen. Der Scan ist schreibgeschützt.
shell
tmaegis scan --target m365