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Advanced phishing thresholds
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defender-office-365/anti-phishing-policies-about.md

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- **Impersonation protection**:
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- Protection against user, domain, and sender impersonation.
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- Ability to define trusted senders and domains to reduce false positives.
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- **Advanced phishing detection**:
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- **Phishing email thresholds**:
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- Customizable phishing thresholds to fine-tune detection.
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- **AI and machine learning-based detection**:
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- Improved detection of sophisticated phishing attacks through advanced algorithms.
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|Spoof settings|||
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|First contact safety tip|||
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|Impersonation settings|||
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|Advanced phishing thresholds|||
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|Phishing email thresholds|||
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<sup>\*</sup> In the default policy, the policy name and description are read-only (the description is blank), and you can't specify who the policy applies to (the default policy applies to all recipients).
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This section describes the policy settings that are only available in anti-phishing policies in Defender for Office 365.
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> [!NOTE]
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> The default anti-phishing policy in Defender for Office 365 provides [spoof protection](anti-phishing-policies-about.md#spoof-settings) and mailbox intelligence for all recipients. However, the other available [impersonation protection](#impersonation-settings-in-anti-phishing-policies-in-microsoft-defender-for-office-365) features and [advanced settings](anti-phishing-policies-about.md#advanced-phishing-thresholds-in-anti-phishing-policies-in-microsoft-defender-for-office-365) aren't configured or enabled in the default policy. To enable all protection features, modify the default anti-phishing policy or create other anti-phishing policies.
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> The default anti-phishing policy in Defender for Office 365 provides [spoof protection](anti-phishing-policies-about.md#spoof-settings) and mailbox intelligence for all recipients. However, the other available [impersonation protection](#impersonation-settings-in-anti-phishing-policies-in-microsoft-defender-for-office-365) features and [phishing email thresholds](anti-phishing-policies-about.md#phishing-email-thresholds-in-anti-phishing-policies-in-microsoft-defender-for-office-365) aren't configured in the default policy. To enable all protection features, modify the default anti-phishing policy or create other anti-phishing policies.
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### Impersonation settings in anti-phishing policies in Microsoft Defender for Office 365
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### Advanced phishing thresholds in anti-phishing policies in Microsoft Defender for Office 365
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<a name='advanced-phishing-thresholds-in-anti-phishing-policies-in-microsoft-defender-for-office-365'></a>
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The following advanced phishing thresholds are only available in anti-phishing policies in Defender for Office 365. These thresholds control the sensitivity for applying machine learning models to messages to determine a phishing verdict:
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### Phishing email thresholds in anti-phishing policies in Microsoft Defender for Office 365
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The following phishing email thresholds are available only in anti-phishing policies in Defender for Office 365. These thresholds control the sensitivity for applying machine learning models to messages for phishing verdicts:
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- **1 - Standard**: This is the default value. The severity of the action that's taken on the message depends on the degree of confidence that the message is phishing (low, medium, high, or very high confidence). For example, messages that are identified as phishing with a very high degree of confidence have the most severe actions applied, while messages that are identified as phishing with a low degree of confidence have less severe actions applied.
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- **2 - Aggressive**: Messages that are identified as phishing with a high degree of confidence are treated as if they were identified with a very high degree of confidence.
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- **3 - More aggressive**: Messages that are identified as phishing with a medium or high degree of confidence are treated as if they were identified with a very high degree of confidence.
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- **4 - Most aggressive**: Messages that are identified as phishing with a low, medium, or high degree of confidence are treated as if they were identified with a very high degree of confidence.
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The chance of false positives (good messages marked as bad) increases as you increase this setting. For information about the recommended settings, see [anti-phishing policy settings in Microsoft Defender for Office 365](recommended-settings-for-eop-and-office365.md#anti-phishing-policy-settings-in-microsoft-defender-for-office-365).
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The chance of false positives (good messages marked as bad) increases as you increase this setting. For information about the recommended settings, see [Phishing email thresholds in anti-phishing policies in Microsoft Defender for Office 365](recommended-settings-for-eop-and-office365.md#phishing-email-thresholds-in-anti-phishing-policies-in-microsoft-defender-for-office-365).
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### Spoofing vs. impersonation
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defender-office-365/anti-phishing-policies-mdo-configure.md

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- **3 - More aggressive**
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- **4 - Most aggressive**
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For more information about this setting, see [Advanced phishing thresholds in anti-phishing policies in Microsoft Defender for Office 365](anti-phishing-policies-about.md#advanced-phishing-thresholds-in-anti-phishing-policies-in-microsoft-defender-for-office-365).
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For more information about this setting, see [Phishing email thresholds in anti-phishing policies in Microsoft Defender for Office 365](anti-phishing-policies-about.md#phishing-email-thresholds-in-anti-phishing-policies-in-microsoft-defender-for-office-365).
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- **Impersonation**: These settings are conditions for the policy that identify specific senders to look for (individually or by domain) in the From address of inbound messages. For more information, see [Impersonation settings in anti-phishing policies in Microsoft Defender for Office 365](anti-phishing-policies-about.md#impersonation-settings-in-anti-phishing-policies-in-microsoft-defender-for-office-365).
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defender-office-365/anti-phishing-protection-about.md

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Microsoft Defender for Office 365 contains additional and more advanced anti-phishing features:
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- **Anti-phishing policies in Microsoft Defender for Office 365**:
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- Configure impersonation protection settings for specific message senders and sender domains, mailbox intelligence settings, and adjustable advanced phishing thresholds. For more information, see [Configure anti-phishing policies in Microsoft Defender for Office 365](anti-phishing-policies-mdo-configure.md).
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- Configure impersonation protection settings for specific message senders and sender domains, mailbox intelligence settings, and adjustable phishing email thresholds. For more information, see [Configure anti-phishing policies in Microsoft Defender for Office 365](anti-phishing-policies-mdo-configure.md).
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- Details about detected impersonation attempts are available in the impersonation insight. For more information, see [Impersonation insight in Defender for Office 365](anti-phishing-mdo-impersonation-insight.md).
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- For more information about the differences between anti-phishing policies in EOP and anti-phishing policies in Defender for Office 365, see [Anti-phishing policies in Microsoft 365](anti-phishing-policies-about.md).
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- **Campaign Views**: Machine learning and other heuristics identify and analyze messages that are involved in coordinated phishing attacks against the entire service and your organization. For more information, see [Campaign Views in Microsoft Defender for Office 365](campaigns.md).

defender-office-365/anti-phishing-protection-tuning.md

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- [Safe Links in Microsoft Defender for Office 365](safe-links-policies-configure.md)
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- [Safe Attachments in Microsoft Defender for Office 365](safe-attachments-policies-configure.md)
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- [Anti-phishing policies in Microsoft Defender for Office 365](anti-phishing-policies-mdo-configure.md). You can temporarily increase the **Advanced phishing thresholds** in the policy from **Standard** to **Aggressive**, **More aggressive**, or **Most aggressive**.
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- [Anti-phishing policies in Microsoft Defender for Office 365](anti-phishing-policies-mdo-configure.md). You can temporarily increase the **Phishing email threshold** in the policy from **Standard** to **Aggressive**, **More aggressive**, or **Most aggressive**.
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Verify these policies are working. Safe Links and Safe Attachments protection is turned on by default, thanks to Built-in protection in [preset security policies](preset-security-policies.md). Anti-phishing has a default policy that applies to all recipients where anti-spoofing protection is turned on by default. Impersonation protection isn't turned on in the policy, and therefore needs to be configured. For instructions, see [Configure anti-phishing policies in Microsoft Defender for Office 365](anti-phishing-policies-mdo-configure.md).
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defender-office-365/configuration-analyzer-for-security-policies.md

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- Anti-phishing policies in Microsoft Defender for Office 365, which include:
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- The same [spoof settings](anti-phishing-policies-about.md#spoof-settings) that are available in the EOP anti-phishing policies.
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- [Impersonation settings](anti-phishing-policies-about.md#impersonation-settings-in-anti-phishing-policies-in-microsoft-defender-for-office-365)
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- [Advanced phishing thresholds](anti-phishing-policies-about.md#advanced-phishing-thresholds-in-anti-phishing-policies-in-microsoft-defender-for-office-365)
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- [Phishing email thresholds](anti-phishing-policies-about.md#phishing-email-thresholds-in-anti-phishing-policies-in-microsoft-defender-for-office-365)
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- [Safe Links policies](safe-links-policies-configure.md).
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- [Safe Attachments policies](safe-attachments-policies-configure.md).
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defender-office-365/mdo-about.md

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|Prevent/Detect|Investigate|Respond|
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|---|---|---|
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|<ul><li>The following [additional features in anti-phishing policies](anti-phishing-protection-about.md#additional-anti-phishing-protection-in-microsoft-defender-for-office-365), including the [impersonation insight](anti-phishing-mdo-impersonation-insight.md): <ul><li>User and domain impersonation protection</li><li>Mailbox intelligence impersonation protection (contact graph)</li><li>Advanced phishing thresholds</li></ul></li><li>[Safe Attachments in email](safe-attachments-about.md)</li><li>[Safe Attachments for files in SharePoint, OneDrive, and Microsoft Teams](safe-attachments-for-spo-odfb-teams-about.md)</li><li>[Safe Links in email, Office clients, and Teams](safe-links-about.md)</li><li>Email & collaboration alerts at <https://security.microsoft.com/viewalertsv2><li>SIEM integration API for **alerts**</li></ul>|<ul><li>[Real-time detections](threat-explorer-real-time-detections-about.md)<sup>\*</sup></li><li>[The Email entity page](mdo-email-entity-page.md)</li><li>SIEM integration API for **detections**</li><li>[URL trace](/defender-endpoint/investigate-domain)</li><li>[Defender for Office 365 reports](reports-defender-for-office-365.md)</li></ul>|<ul><li>Same</li></ul>|
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|<ul><li>The following [additional features in anti-phishing policies](anti-phishing-protection-about.md#additional-anti-phishing-protection-in-microsoft-defender-for-office-365), including the [impersonation insight](anti-phishing-mdo-impersonation-insight.md): <ul><li>User and domain impersonation protection</li><li>Mailbox intelligence impersonation protection (contact graph)</li><li>[Phishing email thresholds](anti-phishing-policies-about.md#phishing-email-thresholds-in-anti-phishing-policies-in-microsoft-defender-for-office-365)</li></ul></li><li>[Safe Attachments in email](safe-attachments-about.md)</li><li>[Safe Attachments for files in SharePoint, OneDrive, and Microsoft Teams](safe-attachments-for-spo-odfb-teams-about.md)</li><li>[Safe Links in email, Office clients, and Teams](safe-links-about.md)</li><li>Email & collaboration alerts at <https://security.microsoft.com/viewalertsv2><li>SIEM integration API for **alerts**</li></ul>|<ul><li>[Real-time detections](threat-explorer-real-time-detections-about.md)<sup>\*</sup></li><li>[The Email entity page](mdo-email-entity-page.md)</li><li>SIEM integration API for **detections**</li><li>[URL trace](/defender-endpoint/investigate-domain)</li><li>[Defender for Office 365 reports](reports-defender-for-office-365.md)</li></ul>|<ul><li>Same</li></ul>|
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<sup>\*</sup> The presence of **Email & collaboration** \> **Real-time detections** in the Microsoft Defender portal is a quick way to differentiate between Defender for Office 365 Plan 1 and Plan 2.
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|Defender for Office 365 Plan 1|Defender for Office 365 Plan 2|
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|Prevent and detect capabilities: <ul><li>[Anti-phishing policies with impersonation protection and Advanced phishing thresholds](anti-phishing-policies-about.md#exclusive-settings-in-anti-phishing-policies-in-microsoft-defender-for-office-365)</li><li>[Safe Attachments](safe-attachments-about.md), including [Safe Attachments for SharePoint, OneDrive, and Microsoft Teams](safe-attachments-for-spo-odfb-teams-about.md)</li><li>[Safe Links](safe-links-about.md)</li></ul> <br/> Investigate and respond capabilities: <ul><li>[Real-time detections](threat-explorer-real-time-detections-about.md)</li><li>[The Email entity page](mdo-email-entity-page.md)</li></ul>|Everything in Defender for Office 365 Plan 1 capabilities <br/><br/> --- plus --- <br/><br/> Prevent and detect capabilities: <ul><li>[Attack simulation training](attack-simulation-training-simulations.md)</li></ul> <br/> Investigate and respond capabilities: <ul><li>[Threat Explorer (Explorer)](threat-explorer-real-time-detections-about.md)</li><li>[Threat Trackers](threat-trackers.md)</li><li>[AIR](air-about.md)</li><li>[Proactively hunt for threats with advanced hunting in Microsoft Defender XDR](/defender-xdr/advanced-hunting-overview)</li><li>[Investigate incidents in Microsoft Defender XDR](/defender-xdr/investigate-incidents)</li><li>[Investigate alerts in Microsoft Defender XDR](/defender-xdr/investigate-alerts)</li></ul>|
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|Prevent and detect capabilities: <ul><li>[Anti-phishing policies with impersonation protection and phishing email thresholds](anti-phishing-policies-about.md#exclusive-settings-in-anti-phishing-policies-in-microsoft-defender-for-office-365)</li><li>[Safe Attachments](safe-attachments-about.md), including [Safe Attachments for SharePoint, OneDrive, and Microsoft Teams](safe-attachments-for-spo-odfb-teams-about.md)</li><li>[Safe Links](safe-links-about.md)</li></ul> <br/> Investigate and respond capabilities: <ul><li>[Real-time detections](threat-explorer-real-time-detections-about.md)</li><li>[The Email entity page](mdo-email-entity-page.md)</li></ul>|Everything in Defender for Office 365 Plan 1 capabilities <br/><br/> --- plus --- <br/><br/> Prevent and detect capabilities: <ul><li>[Attack simulation training](attack-simulation-training-simulations.md)</li></ul> <br/> Investigate and respond capabilities: <ul><li>[Threat Explorer (Explorer)](threat-explorer-real-time-detections-about.md)</li><li>[Threat Trackers](threat-trackers.md)</li><li>[AIR](air-about.md)</li><li>[Proactively hunt for threats with advanced hunting in Microsoft Defender XDR](/defender-xdr/advanced-hunting-overview)</li><li>[Investigate incidents in Microsoft Defender XDR](/defender-xdr/investigate-incidents)</li><li>[Investigate alerts in Microsoft Defender XDR](/defender-xdr/investigate-alerts)</li></ul>|
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- For more information, see [Feature availability across Defender for Office 365 plans](/office365/servicedescriptions/office-365-advanced-threat-protection-service-description#feature-availability).
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- [Safe Documents](safe-documents-in-e5-plus-security-about.md) is available to users with the Microsoft 365 A5 or Microsoft 365 E5 Security licenses (not included in Defender for Office 365 plans).

defender-office-365/mdo-deployment-guide.md

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|&nbsp;&nbsp;[Outbound spam](outbound-spam-policies-configure.md)||||
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|&nbsp;&nbsp;[Connection filtering](connection-filter-policies-configure.md)|✔¹|||
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|**Defender for Office 365 policies**:||||
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|&nbsp;&nbsp;[Anti-phishing (spoofing protection)](anti-phishing-policies-about.md#spoof-settings) plus: <ul><li>[Impersonation protection](anti-phishing-policies-about.md#impersonation-settings-in-anti-phishing-policies-in-microsoft-defender-for-office-365)</li><li>[Advanced phishing thresholds](anti-phishing-policies-about.md#advanced-phishing-thresholds-in-anti-phishing-policies-in-microsoft-defender-for-office-365)</li></ul>|✔²|✔²||
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|&nbsp;&nbsp;[Anti-phishing (spoofing protection)](anti-phishing-policies-about.md#spoof-settings) plus: <ul><li>[Impersonation protection](anti-phishing-policies-about.md#impersonation-settings-in-anti-phishing-policies-in-microsoft-defender-for-office-365)</li><li>[Phishing email thresholds](anti-phishing-policies-about.md#phishing-email-thresholds-in-anti-phishing-policies-in-microsoft-defender-for-office-365)</li></ul>|✔²|✔²||
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|&nbsp;&nbsp;[Safe Links](safe-links-policies-configure.md)|³|||
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|&nbsp;&nbsp;[Safe Attachments](safe-attachments-policies-configure.md)|³|||
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|**General behavior**||||

defender-office-365/preset-security-policies.md

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- Anti-phishing policies in Defender for Office 365 named **Standard Preset Security Policy** and **Strict Preset Security Policy**, which include:
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- The same [spoof settings](anti-phishing-policies-about.md#spoof-settings) that are available in the EOP anti-phishing policies.
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- [Impersonation settings](anti-phishing-policies-about.md#impersonation-settings-in-anti-phishing-policies-in-microsoft-defender-for-office-365)
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- [Advanced phishing thresholds](anti-phishing-policies-about.md#advanced-phishing-thresholds-in-anti-phishing-policies-in-microsoft-defender-for-office-365)
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- [Phishing email thresholds](anti-phishing-policies-about.md#phishing-email-thresholds-in-anti-phishing-policies-in-microsoft-defender-for-office-365)
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- [Safe Links policies](safe-links-policies-configure.md) named **Standard Preset Security Policy**, **Strict Preset Security Policy**, and **Built-in Protection Policy**.
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- [Safe Attachments policies](safe-attachments-policies-configure.md) named **Standard Preset Security Policy**, **Strict Preset Security Policy**, and **Built-in Protection Policy**.
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