Ensure 'Retain deleted items for the specified number of days' is set to '14'

中レベル 1自動exchange

説明

This policy setting specifies how long deleted messages are retained before they are permanently removed from the database. Prints the number of mailbox databases whose DeletedItemRetention is less than 14 days (expected 0). Run on a Mailbox server (organization-wide objects are read from AD). Run from an Exchange Management Shell or after `Add-PSSnapin Microsoft.Exchange.Management.PowerShell.SnapIn`; the audit loads the snap-in itself when Get-ExchangeServer is missing and fails if it cannot.

チェック方法

監査方法: シェルコマンド

shell

$ErrorActionPreference = 'Stop'; if (-not (Get-Command Get-ExchangeServer -ErrorAction SilentlyContinue)) { Add-PSSnapin Microsoft.Exchange.Management.PowerShell.SnapIn -ErrorAction Stop }; if (-not (Get-Command Get-ExchangeServer -ErrorAction SilentlyContinue)) { throw 'Exchange Management Shell cmdlets are not available' }; $ts = { param($v) $s = "$v"; if (-not $s -or $s -eq 'Unlimited') { $null } else { [timespan]$s } }; $bad = @(Get-MailboxDatabase -ErrorAction Stop | Where-Object { $t = & $ts $_.DeletedItemRetention; $null -eq $t -or $t.TotalDays -lt 14 }); $bad.Count

期待される出力: 0

修正方法

修正方法: ガイダンスまたは IaC パッチ

Set-MailboxDatabase '<database>' -DeletedItemRetention 14

プロパティ

オペレーティングシステム: すべて
タグ: exchangemailboxretention
参照: CIS Microsoft Exchange Server 2019 Benchmark v1.0.1 - 2.1.2 Ensure 'Retain deleted items for the specified number of days' is set to '14'

このホストをチェック

監査が許可されているマシンで実行してください。スキャンは読み取り専用です。

shell

tmaegis scan --target exchange