Users, groups, and domains: Identifies internal recipients that the anti-phishing policy applies to. If your subscription includes Microsoft Defender for Office 365, you can use Office 365 Threat Intelligence to identify other users who also received the phishing message. On the Anti-phishing page, select a custom policy from the list by clicking on the name. More info about Internet Explorer and Microsoft Edge, Microsoft Defender for Office 365 plan 1 and plan 2, Recover from a ransomware attack in Microsoft 365, Manage the Tenant Allow/Block List in EOP, Configure anti-phishing policies in Microsoft Defender for Office 365, Campaign Views in Microsoft Defender for Office 365, Protect yourself from phishing schemes and other forms of online fraud, How Microsoft 365 validates the From address to prevent phishing. If Microsoft 365 system messages from the following senders are identified as impersonation attempts, you can add the senders to the trusted senders list: Trusted domain entries don't include subdomains of the specified domain. For example, you configure a recipient filter condition in the policy with the following values: The policy is applied to romain@contoso.com only if he's also a member of the Executives group. After you locate the message, go to details by clicking on the subject. The policy is applied only to those recipients that match all of the specified recipient filters. Multiple values in the same condition use OR logic (for example, or ). Create a new anti-phishing policy wizard. When you modify an anti-phishing policy, settings related to the name, priority, enabled or disabled, and recipient filters modify the anti-phish rule. For a phased approach, start by enabling MFA for your most sensitive users (admins, executives, etc.) To remove an existing value, click remove next to the value. Multiple different types of conditions or exceptions are not additive; they're inclusive. If you select Quarantine the message, you can also select the quarantine policy that applies to messages that are quarantined by user impersonation or domain impersonation protection. An attacker may use cunning tactics, such as referring to the victims by . If he's not a member of the group, then the policy is not applied to him. Messages that skip filtering will have an entry of SCL:-1, which means one of your settings allowed this message through by overriding the spam or phishing verdicts that were determined by the service. For more information about spoofing, see Anti-spoofing protection in Microsoft 365. Actions: For messages from blocked spoofed senders (automatically blocked by spoof intelligence or manually blocked in the Tenant Allow/Block list), you can also specify the action to take on the messages: Move messages to the recipients' Junk Email folders: This is the default value. Give the policy a name and a brief description, and click Next. You open the Microsoft 365 Defender portal at https://security.microsoft.com. This list of sender domains that are protected from impersonation is different from the list of recipients that the policy applies to (all recipients for the default policy; specific recipients as configured in the Users, groups, and domains setting in the Common policy settings section). For more information, see Spoof intelligence insight in EOP. Learn about who can sign up and trial terms here. For more information, see Mitigating Client External Forwarding Rules with Secure Score. No two policies can have the same priority, and policy processing stops after the first policy is applied. When you later edit the anti-phishing policy or view the settings, the default quarantine policy name is shown. Anti-phishing policies in Defender for Office 365 also have impersonation settings where you can specify individual sender email addresses or sender domains that will receive impersonation protection as described later in this article. When you use the Microsoft 365 Defender portal to remove a custom anti-phishing policy, the anti-phish rule and the corresponding anti-phish policy are both deleted. A new anti-phish policy that you create in PowerShell isn't visible in the Microsoft 365 Defender portal until you assign the policy to an anti-phish rule. Outlook and student Gmail users at IU can also get a one-click reporting tool that takes care of reporting the phish to the policy office for you. This example returns all the property values for the anti-phish policy named Executives. In the Microsoft 365 Defender portal at https://security.microsoft.com, go to Email & Collaboration > Policies & Rules > Threat policies > Anti-phishing in the Policies section. You can specify a maximum of 50 custom domains in each anti-phishing policy. They may try and steal your online banking logins, credit card details or passwords. Spoof: In this section, use the Enable spoof intelligence check box to turn spoof intelligence on or off. For more information, see the Use Exchange Online PowerShell to configure anti-phishing policies section later in this article. Learn about who can sign up and trial terms here. For more information, see the following articles: Unauthenticated sender indicators: Available in the Safety tips & indicators section only when spoof intelligence is turned on. Anti-Phishing for Microsoft 365. Did you know you can try the features in Microsoft 365 Defender for Office 365 Plan 2 for free? On the Anti-phishing page, select a custom policy from the list by clicking on the name of the policy. For example, Gabriela Laureano (glaureano@contoso.com) is the CEO of your company, so you add her as a protected sender in the Enable users to protect settings of the policy. Back on the main policy page, the Status value of the policy will be On or Off. For detailed syntax and parameter information, see Enable-AntiPhishRule and Disable-AntiPhishRule. If mailbox intelligence detects an impersonated user: This setting is available only if you selected Enable intelligence for impersonation protection on the previous page. Adding to your defense system is never a bad idea since it can provide complete coverage for all sorts of phishing attacks. For example, contosososo.com or contoabcdef.com might be seen as impersonation attempts of contoso.com. If the majority of recipients have never or don't often receive messages from the sender, then the affected recipients will receive the Some people who received this message tip. A new policy wizard opens as a pop-up window. Changing the priority of an existing rule can have a cascading effect on other rules. If you're concerned that this behavior exposes the communication habits of one recipient to another, you should not enable the first contact safety tip and continue to use mail flow rules instead. To view existing anti-phish rules, use the following syntax: This example returns a summary list of all anti-phish rules along with the specified properties. KnowBe4 has some great user training tools, but word to the wise, never phish your org without management being aware it's happening! You can't specify the same protected user in multiple policies. The policy wizard opens. For our recommended settings for anti-phishing policies in Defender for Office 365, see Anti-phishing policy in Defender for Office 365 settings. Anti-phishing protection in EOP. Members of the specified distribution groups or mail-enabled security groups. When you use PowerShell to remove an anti-phish policy, the corresponding anti-phish rule isn't removed. In the left part of the page, select the Protection section. Specify the action for blocked spoofed senders. Enable users to protect: The default value is off (not selected). The default value is on (selected), and we recommend that you leave it on. When you modify a policy, settings related to the name, priority, enabled or disabled, and recipient filters modify the anti-phish rule. When you create an anti-phishing policy, you're actually creating an anti-phish rule and the associated anti-phish policy at the same time using the same name for both. To enable or disable existing anti-phish rules, see the next section. If you're opening this page for the first time, the list of anti-phishing policies will be empty. This value is required in custom policies, and not available in the default policy (the default policy applies to all recipients). Likewise, if you use the same recipient filter as an exception to the policy, the policy is not applied to romain@contoso.com only if he's also a member of the Executives group. In each anti-phishing policy, you can specify a maximum of 301 protected users (sender email addresses). Spoofing is when the From address in an email message (the sender address that's shown in email clients) doesn't match the domain of the email source. Multi factor authentication (MFA) is a good way to prevent compromised accounts. Microsoft Defender for Office 365 contains additional and more advanced anti-phishing features: For end users: Protect yourself from phishing schemes and other forms of online fraud. Multiple values in the same condition use OR logic (for example, or ). For our recommended settings, see Recommended settings for EOP and Microsoft Defender for Office 365 security and Create safe sender lists. Quarantine policies define what users are able to do to quarantined messages, and whether users receive quarantine notifications. Select which individuals the policies are applied to. For more information, see Configure junk email settings on Exchange Online mailboxes in Microsoft 365. Click Close in the policy details flyout. For more information about these addresses, see An overview of email message standards. You can't specify the same protected user in multiple policies. Verify these Defender for Office 365 features are turned on. To turn off spoof intelligence, clear the check box. You can manually override the spoof intelligence verdict to allow or block the detected spoofed senders from within the insight. When you remove an anti-phish policy from PowerShell, the corresponding anti-phish rule isn't automatically removed, and vice versa. The new Office 365 ATP anti-phishing policy allows us to configure both user impersonation and domain impersonation detection settings. All existing rules that have a priority less than or equal to 2 are decreased by 1 (their priority numbers are increased by 1). EOP customers get basic anti-phishing as previously described, but Defender for Office 365 includes more features and control to help prevent, detect, and remediate against attacks. For more information about policy priority and how policy processing stops after the first policy is applied, see. Anti-phishing policies in Microsoft Defender for Office 365 can help protect your organization from malicious impersonation-based phishing attacks and other types of phishing attacks. Did you know you can try the features in Microsoft 365 Defender for Office 365 Plan 2 for free? Navigate towards LHS of the panel and click on Threat Management >> Policy. hot docs.microsoft.com. Deliver the message and add other addresses to the Bcc line. On the Anti-phishing page, the following properties are displayed in the list of anti-phishing policies: When you select a policy by clicking on the name, the policy settings are displayed in a flyout.
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