Ensure SMTP AUTH is disabled

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Mô tả

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.

Cách kiểm tra

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Khuyến nghị này không thể kiểm tra tự động. Lần quét sẽ liệt kê mục này kèm hướng dẫn khi bạn truyền cờ --include-manual.

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.

Cách khắc phục

Phương pháp khắc phục: Hướng dẫn hoặc bản vá hạ tầng

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

Thuộc tính

Hệ điều hành: Bất kỳ
Thẻ: authm365saas
Tham chiếu: CIS Microsoft 365 Foundations Benchmark v7.0.0 - 6.5.4 Ensure SMTP AUTH is disabled