Microsoft Defender for Office 365
Email and collaborationQuarantine Admin Manage Messages Files
In brief
The instructions now state that the Source tab displays the message body as HTML with links disabled. The separate Plain text tab description was removed, and the metadata date was updated.
What Defender admins need to know
Administrators reviewing quarantined messages should use the Source tab guidance when inspecting message content.
Summaries are generated from the documentation change itself.
Documentation change
View on Microsoft LearnThe comparison below shows only the changed extract. Use the full-page view for complete context.
- m365-security
- tier1 ms.custom:
- msecd-doc-authoring-
10161030 - seo-marvel-apr2020
- sfi-ga-nochange
- sfi-image-nochange
description: Admins can learn how to view and manage quarantined messages for all users in Microsoft 365 organizations with cloud mailboxes. Admins in organizations with Microsoft Defender for Office 365 can also manage quarantined files in SharePoint, OneDrive, and Microsoft Teams.
ms.service: defender-office-365
ms.date: 2026-
08-31T00:10-07T00:00:00.0000000Z ai-usage: ai-assisted locale: en-us document_id: 63f8cdbb-7429-da44-41cb-c85bb9f27e99 - On the Email tab: Select
Preview message. - In the details flyout of the selected message: Select
More options > Preview message.
In the flyout that opens, choose one of the following tabs:
- Source
: Showstab shows the HTML version of the message body with all links disabled. Plain text: Shows the message body in plain text.
View email message headers
- On the Teams messages tab: Select Preview message.
- In the details flyout of the selected message: Select Preview message.
In the flyout that opens, choose one of the following tabs:
- Source
: Showstab shows the HTML version of the message body with all links disabled. Plain text: Shows the message body in plain text.
Submit Teams messages to Microsoft for review from quarantine
@@ -17,13 +17,13 @@ ms.collection: - m365-security - tier1 ms.custom:-- msecd-doc-authoring-1016+- msecd-doc-authoring-1030 - seo-marvel-apr2020 - sfi-ga-nochange - sfi-image-nochange description: Admins can learn how to view and manage quarantined messages for all users in Microsoft 365 organizations with cloud mailboxes. Admins in organizations with Microsoft Defender for Office 365 can also manage quarantined files in SharePoint, OneDrive, and Microsoft Teams. ms.service: defender-office-365-ms.date: 2026-08-31T00:00:00.0000000Z+ms.date: 2026-10-07T00:00:00.0000000Z ai-usage: ai-assisted locale: en-us document_id: 63f8cdbb-7429-da44-41cb-c85bb9f27e99@@ -429,10 +429,7 @@ After you select the message, use either of the following methods to preview it: - **On the Email tab**: Select **Preview message**.
- **In the details flyout of the selected message**: Select **More options** > **Preview message**.
-In the flyout that opens, choose one of the following tabs:
-
-- **Source**: Shows the HTML version of the message body with all links disabled.
-- **Plain text**: Shows the message body in plain text.
+In the flyout that opens, the **Source** tab shows the HTML version of the message body with all links disabled.
#### View email message headers
@@ -902,10 +899,7 @@ After you select the Teams message, use either of the following methods to previ - **On the Teams messages tab**: Select **Preview message**.
- **In the details flyout of the selected message**: Select **Preview message**.
-In the flyout that opens, choose one of the following tabs:
-
-- **Source**: Shows the HTML version of the message body with all links disabled.
-- **Plain text**: Shows the message body in plain text.
+In the flyout that opens, the **Source** tab shows the HTML version of the message body with all links disabled.
#### Submit Teams messages to Microsoft for review from quarantine