Ensure external Teams users cannot initiate conversations

中レベル 1手動レビューm365

説明

This setting prevents external users who are not managed by an organization from initiating contact with users in the protected organization. The recommended state is to uncheck People in my org can chat and have meetings with external users who have unmanaged Microsoft accounts. Note: Disabling this setting is used as an additional stop gap for the parent setting which disables communication with unmanaged Teams users entirely. If an organization chooses to have an exception to Ensure communication with unmanaged Teams users is disabled they can do so while also disabling the ability for the same group of users to initiate contact. Disabling communication entirely will also disable the ability for unmanaged users to initiate contact. Allowing users to communicate with unmanaged Teams users presents a potential security threat as little effort is required by threat actors to gain acce...

チェック方法

監査方法: 手動レビュー

この推奨事項は自動ではチェックできません。--include-manual を指定すると、スキャン結果にこの手順付きで一覧表示されます。

Note: The focus of this control at a minimum is the Global (Org-wide default) policy. If the equivalent organization-wide setting is disabled, then this is also considered a passing state due to its increased restrictiveness. To audit using the UI: Note: If the parent setting People in my org can chat and have meetings with external users who have unmanaged Microsoft accounts is already set to Off then this setting will not be visible in the UI. 1. Navigate to Microsoft Teams admin center https://admin.teams.microsoft.com/. 2. Expand External collaboration and select External access. 3. Open the Policies tab. 4. Click on the Global (Org-wide default) settings policy. 5. Locate the parent setting People in my org can chat and have meetings with external users who have unmanaged Microsoft accounts. 6. Verify that People in my org can join external meetings and receive new chats from users who have unmanaged Microsoft accounts is not checked. To audit using PowerShell: 1. Connect to Teams PowerShell using Connect-MicrosoftTeams 2. Run the following command: Get-CsExternalAccessPolicy -Identity Global Verify that EnableTeamsConsumerInbound is False Organization settings: Optional pa...

修正方法

修正方法: ガイダンスまたは IaC パッチ

Note: Configuring this setting at the organization level in Organization settings to Off is also a compliant remediation for this control. To remediate using the UI: 1. Navigate to Microsoft Teams admin center https://admin.teams.microsoft.com/. 2. Expand External collaboration and select External access. 3. Open the Policies tab. 4. Click on the Global (Org-wide default) settings policy. 5. Locate the parent setting People in my org can chat and have meetings with external users who have unmanaged Microsoft accounts. 6. Uncheck People in my org can join external meetings and receive new chats from users who have unmanaged Microsoft accounts. 7. Click Save. To remediate using PowerShell: 1. Connect to Teams PowerShell using Connect-MicrosoftTeams 2. Run the following command: Set-CsExternalAccessPolicy -Identity Global -EnableTeamsConsumerInbound $false

プロパティ

オペレーティングシステム: すべて
タグ: m365saas
参照: CIS Microsoft 365 Foundations Benchmark v7.0.0 - 8.2.3 Ensure external Teams users cannot initiate conversations