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defender-endpoint/TOC.yml

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href: evaluate-microsoft-defender-antivirus.md
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- name: Evaluate Microsoft Defender Antivirus using PowerShell
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href: microsoft-defender-antivirus-using-powershell.md
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- name: Evaluate Microsoft Defender Antivirus using MDE Security Settings Management
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href: microsoft-defender-antivirus-using-mde-security-set-mngmnt.md
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- name: Microsoft Defender for Endpoint demonstration scenarios
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href: defender-endpoint-demonstrations.md
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- name: App reputation demonstration

defender-endpoint/admin-submissions-mde.md

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title: Submit files in Microsoft Defender for Endpoint
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description: Learn how to use the unified submissions feature in Microsoft Defender XDR to submit suspicious emails, URLs, email attachments, and files to Microsoft for scanning.
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search.appverid: met150
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ms.date: 02/15/2024
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ms.date: 05/06/2024
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ms.service: defender-endpoint
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ms.author: siosulli
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author: siosulli
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manager: deniseb
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localization_priority: Normal
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ms.localizationpriority: medium
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audience: ITPro
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ms.topic: how-to
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ms.collection:

defender-endpoint/api/add-or-remove-machine-tags.md

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ms.subservice: reference
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ms.custom: api
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ms.date: 02/24/2023
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ms.date: 05/02/2024
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---
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# Add or remove a tag for a machine
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## API description
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Adds or removes a tag for a specific [Machine](machine.md).
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Adds or removes a tag for a specific [device](machine.md).
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> [!NOTE]
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> If you are looking for how to tag machines in bulk via API, see [Add or remove multiple machine tags](/defender-endpoint/api/add-or-remove-multiple-machine-tags).
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## Limitations
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defender-endpoint/attack-surface-reduction-rules-reference.md

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- m365-security
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- tier2
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- mde-asr
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ms.date: 04/26/2024
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ms.date: 05/02/2024
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search.appverid: met150
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---
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[!Include[Prerelease information](../includes/prerelease.md)]
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> [!TIP]
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> As a companion to this article, we recommend using the [Microsoft Defender for Endpoint automated setup guide](https://go.microsoft.com/fwlink/?linkid=2268088) when signed in to the Microsoft 365 admin center. This guide will customize your experience based on your environment. To review best practices without signing in and activating automated setup features, go to the [Microsoft 365 setup guide](https://go.microsoft.com/fwlink/?linkid=2268087).
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## Attack surface reduction rules by type
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Attack surface reduction rules are categorized as one of two types:
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- **Standard protection rules**: Are the minimum set of rules which Microsoft recommends you always enable, while you're evaluating the affect and configuration needs of the other ASR rules. These rules typically have minimal-to-no noticeable impact on the end user.
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- **Standard protection rules**: Are the minimum set of rules which Microsoft recommends you always enable, while you're evaluating the effect and configuration needs of the other ASR rules. These rules typically have minimal-to-no noticeable impact on the end user.
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- **Other rules**: Rules that require some measure of following the documented deployment steps [Plan > Test (audit) > Enable (block/warn modes)], as documented in the [Attack surface reduction rules deployment guide](attack-surface-reduction-rules-deployment.md)
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| [Block rebooting machine in Safe Mode (preview)](#block-rebooting-machine-in-safe-mode-preview) | Y | Y | Y | Y | Y |
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| [Block untrusted and unsigned processes that run from USB](#block-untrusted-and-unsigned-processes-that-run-from-usb) | Y | Y | Y | Y | Y |
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| [Block use of copied or impersonated system tools (preview)](#block-use-of-copied-or-impersonated-system-tools-preview) | Y | Y | Y | Y | Y |
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| [Block Webshell creation for Servers](#block-webshell-creation-for-servers) | N | Y <br>Exchange Role Only | Y <br>Exchange Role Only | Y <br>Exchange Role Only | N |
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| [Block Webshell creation for Servers](#block-webshell-creation-for-servers) | N | Y <br>Exchange Role Only | Y <br>Exchange Role Only | Y <br>Exchange Role Only | Y <br>Exchange Role Only |
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| [Block Win32 API calls from Office macros](#block-win32-api-calls-from-office-macros) | Y | N | N | N | N |
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| [Use advanced protection against ransomware](#use-advanced-protection-against-ransomware) | Y <br> version 1803 or later <sup>[[3](#fn1)]</sup> | Y | Y | Y | Y |
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defender-endpoint/attack-surface-reduction.md

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- mde-asr
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ms.date: 05/02/2024
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---
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# Attack surface reduction rules overview
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**Platforms**
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- Windows
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> [!TIP]
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> As a companion to this article, we recommend using the [Microsoft Defender for Endpoint automated setup guide](https://go.microsoft.com/fwlink/?linkid=2268615) when signed in to the Microsoft 365 admin center. This guide will customize your experience based on your environment. To review best practices without signing in and activating automated setup features, go to the [Microsoft 365 setup guide](https://go.microsoft.com/fwlink/?linkid=2268522).
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## Why attack surface reduction rules are important
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Your organization's attack surface includes all the places where an attacker could compromise your organization's devices or networks. Reducing your attack surface means protecting your organization's devices and network, which leaves attackers with fewer ways to perform attacks. Configuring attack surface reduction rules in Microsoft Defender for Endpoint can help!

defender-endpoint/auto-investigation-action-center.md

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|The new, unified Action center |The previous Action center |
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|---------|---------|
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|Lists pending and completed actions for devices and email in one location <br/>([Microsoft Defender for Endpoint](microsoft-defender-endpoint.md) plus [Microsoft Defender for Office 365]/defender-office-365/mdo-about|Lists pending and completed actions for devices <br/> ([Microsoft Defender for Endpoint](microsoft-defender-endpoint.md) only) |
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|Lists pending and completed actions for devices and email in one location <br/>([Microsoft Defender for Endpoint](microsoft-defender-endpoint.md) plus [Microsoft Defender for Office 365](/defender-office-365/mdo-about)|Lists pending and completed actions for devices <br/> ([Microsoft Defender for Endpoint](microsoft-defender-endpoint.md) only) |
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|Is located at:<br/>[https://security.microsoft.com/action-center](https://security.microsoft.com/action-center) |Is located at:<br/>[https://securitycenter.windows.com/action-center](https://securitycenter.windows.com/action-center) |
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| In the <a href="https://go.microsoft.com/fwlink/p/?linkid=2077139" target="_blank">Microsoft Defender portal</a>, choose **Action center**. <p>:::image type="content" source="media/action-center-nav-new.png" alt-text="The navigation pane to the Action Center in the Microsoft Defender portal" lightbox="media/action-center-nav-new.png"::: | In the Microsoft Defender portal, choose **Automated investigations** > **Action center**. <p>:::image type="content" source="media/action-center-nav-old.png" alt-text="An older version of the navigation pane to the Action Center in the Microsoft Defender portal" lightbox="media/action-center-nav-old.png"::: |
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- [Microsoft Defender XDR](/microsoft-365/security/mtp/microsoft-threat-protection)
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- [Defender for Endpoint](microsoft-defender-endpoint.md)
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- [Defender for Office 365]/defender-office-365/mdo-about
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- [Defender for Office 365](/defender-office-365/mdo-about)
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- [Defender for Business](/defender-business/mdb-overview)
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## Using the Action center

defender-endpoint/autoir-investigation-results.md

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## (NEW!) Unified investigation page
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The investigation page has recently been updated to include information across your devices, email, and collaboration content. The new, unified investigation page defines a common language and provides a unified experience for automatic investigations across [Microsoft Defender for Endpoint](microsoft-defender-endpoint.md) and [Microsoft Defender for Office 365]/defender-office-365/mdo-about.
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The investigation page has recently been updated to include information across your devices, email, and collaboration content. The new, unified investigation page defines a common language and provides a unified experience for automatic investigations across [Microsoft Defender for Endpoint](microsoft-defender-endpoint.md) and [Microsoft Defender for Office 365](/defender-office-365/mdo-about).
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defender-endpoint/comprehensive-guidance-on-linux-deployment.md

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Learn about the general guidance on a typical Microsoft Defender for Endpoint on Linux deployment. The applicability of some steps is determined by the requirements of your Linux environment.
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1. [Work with your Firewall, Proxy, and Networking admin](#1-work-with-your-firewall-proxy-and-networking-admin).
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1. [Prepare your network environment](#1-prepare-your-network-environment).
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2. [Capture performance data from the endpoint](#2-capture-performance-data-from-the-endpoint).
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22. [Uninstall your non-Microsoft solution](#22-uninstall-your-non-microsoft-solution).
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Add the Microsoft Defender for Endpoint URLs and/or IP addresses to the allowed list, and prevent traffic from being SSL inspected.
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1. See [Step 1: Allow destinations for the Microsoft Defender for Endpoint traffic](#step-1-allow-destinations-for-the-microsoft-defender-for-endpoint-traffic) that are allowed for the Microsoft Defender for Endpoint traffic.
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> - It is generally recommended that traffic for Defender for Endpoint is not inspected by SSL inspection (TLS inspection). This applies to all supported operating systems (Windows, Linux, and MacOS).
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> - To allow connectivity to the consolidated set of URLs or IP addresses, ensure your devices are running the latest component versions. See [Onboarding devices using streamlined connectivity for Microsoft Defender for Endpoint](configure-device-connectivity.md) for more information.
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) or the [Microsoft Defender for Endpoint URL list for Gov/GCC/DoD](https://download.microsoft.com/download/6/a/0/6a041da5-c43b-4f17-8167-79dfdc10507f/mde-urls-gov.xlsx) for a list of services and their associated URLs that your network must be able to connect.
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> [!NOTE]
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> If the detections do not show up, it could be that you have set "allowedThreats" to allow in preferences via Ansible or Puppet.
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- Endpoint detection and response (EDR) detections, see [Experience Microsoft Defender for Endpoint through simulated attacks](attack-simulations.md). If the detection doesn't show up, then it could be that we're missing event or alerts in portal. For more information, see [Troubleshoot missing events or alerts issues for Microsoft Defender for Endpoint on Linux](linux-support-events.md).
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- For more information about unified submissions in Microsoft Defender XDR and the ability to submit **False Positives** and **False Negatives** through the portal, see [Unified submissions in Microsoft Defender XDR now Generally Available! - Microsoft Tech Community](https://techcommunity.microsoft.com/t5/microsoft-defender-for-endpoint/unified-submissions-in-microsoft-365-defender-now-generally/ba-p/3270770).
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## 20. Troubleshoot missing events or alerts issues for Microsoft Defender for Endpoint on Linux

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