Ensure SMTP AUTH client submission is disabled organization-wide

VisokaNivo 1Automatskam365

Opis

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.

Kako se proverava

Metod provere: Komanda ljuske

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' }

Očekivani izlaz: compliant

Kako se ispravlja

Metod ispravke: Smernica ili zakrpa infrastrukture

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

Svojstva

Operativni sistemi: Bilo koji
Oznake: m365authentication
Referenca: CIS Microsoft 365 Foundations Benchmark v7.0.0 - Exchange Online / SMTP AUTH (verify section number for your release)

Proverite ovaj računar

Pokrenite ovo na računaru za koji imate dozvolu za proveru. Skeniranje radi u režimu samo za čitanje.

shell

tmaegis scan --target m365