Ensure SMTP AUTH is disabled

MittelStufe 1Manuelle Prüfungm365

Beschreibung

This setting enables or disables authenticated client SMTP submission (SMTP AUTH) at an organization level in Exchange Online. The recommended state is Turn off SMTP AUTH protocol for your organization (checked). SMTP AUTH is a legacy protocol. Disabling it at the organization level supports the principle of least functionality and serves to further back additional controls that block legacy protocols, such as in Conditional Access. Virtually all modern email clients that connect to Exchange Online mailboxes in Microsoft 365 can do so without using SMTP AUTH.

So wird geprüft

Prüfmethode: Manuelle Prüfung

Diese Empfehlung kann nicht automatisch geprüft werden. Ein Scan führt sie mit diesen Anweisungen auf, wenn Sie --include-manual übergeben.

To audit using the UI: 1. Navigate to Exchange admin center https://admin.exchange.microsoft.com. 2. Expand Settings and select Mail flow. 3. Ensure Turn off SMTP AUTH protocol for your organization is checked. To audit using PowerShell: 1. Connect to Exchange Online using Connect-ExchangeOnline. 2. Run the following PowerShell command: Get-TransportConfig | Format-List SmtpClientAuthenticationDisabled 3. Verify that the value returned is True.

So wird behoben

Behebungsmethode: Anleitung oder Infrastruktur-Patch

To remediate using the UI: 1. Navigate to Exchange admin center https://admin.exchange.microsoft.com. 2. Expand Settings and select Mail flow. 3. Check Turn off SMTP AUTH protocol for your organization to disable the protocol. To remediate using PowerShell: 1. Connect to Exchange Online using Connect-ExchangeOnline. 2. Run the following PowerShell command: Set-TransportConfig -SmtpClientAuthenticationDisabled $true

Eigenschaften

Betriebssysteme: Beliebig
Tags: authm365saas
Referenz: CIS Microsoft 365 Foundations Benchmark v7.0.0 - 6.5.4 Ensure SMTP AUTH is disabled