For example, if youve never received an email from payroll@globomantis.biz, that will be flagged in the phishing protection tip which should then draw your attention to the impersonated sender (assuming the policy allows the user to ever see that phishing email). Would you do it? Groups: One or more groups in your organization. For example, if the email contains the word Docusign but does pass SPF/DKIM/DMARC, insert a warning into the message that it may be a phishing attempt (or filter/quarantine accordingly). He works as a consultant, writer, and trainer specializing in Office 365 and Exchange Server. 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. Microsoft 365 Exchange Anti-Phish Policy Deletion edit - Elastic Do you have any documentation that explains the different event types on the MailTrafficATPReport ? In the Manage custom domains for impersonation protection flyout that appears, click Add domains. 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. Quarantine policies define what users are able to do to quarantined messages, and whether users receive quarantine notifications. The policy is applied to all recipients in the organization, even though there's no anti-phish rule (recipient filters) associated with the policy. We can see the settings in the Security and Compliance Center by navigating to Threat Management -> Policy -> Anti-phishing. @ Shyamal -- I had not tried the PowerShell online. To turn it off, clear the check box. Ill do some further tests and try to find additional information, maybe there is a possibility to change the behavior. Learn about who can sign up and trial terms here. All other settings modify the associated anti-phish policy. For detailed syntax and parameter information, see Remove-AntiPhishRule. In Exchange Online PowerShell, the difference between anti-phish policies and anti-phish rules is apparent. The next option is to configure mailbox intelligence. To set the priority of an anti-phish rule in PowerShell, use the following syntax: This example sets the priority of the rule named Marketing Department to 2. To go directly to the Anti-phishing page, use https://security.microsoft.com/antiphishing. the server response was 5.7.60 smtp client does not have permission to send as this sender. When you remove an anti-phish policy from PowerShell, the corresponding anti-phish rule isn't automatically removed, and vice versa. Microsoft 365 Enterprise E5, Microsoft 365 Education A5, etc. For more information, see the following articles: Unauthenticated sender indicators: Available in the Safety tips & indicators section only when spoof intelligence is turned on. Move messages to the recipients' Junk Email folders: The message is delivered to the mailbox and moved to the Junk Email folder. On the Anti-phishing page, click Create. The default anti-phishing policy in Microsoft Defender for Office 365 provides spoof protection and mailbox intelligence for all recipients. For example, if your domain is contoso.com, we check for different top-level domains (.com, .biz, etc.) To use frequent contacts that were learned by mailbox intelligence (and lack thereof) to help protect users from impersonation attacks, you can turn on Enable intelligence impersonation protection after you turn on Enable mailbox intelligence. To enable all protection features, modify the default anti-phishing policy or create additional anti-phishing policies. Changing the priority of a policy only makes sense if you have multiple policies. 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. Possibly, if you choose to protect those domains as well. To remove an existing entry, click for the entry. Office 365 Spam Filter: A Complete Setup Guide - Official NAKIVO Blog To verify that you've successfully configured anti-phishing policies in Defender for Office 365, do any of the following steps: On the Anti-phishing page in the Microsoft 365 Defender portal at https://security.microsoft.com/antiphishing, verify the list of policies, their Status values, and their Priority values. With Standard security settings it is recommended to configure Anti-spoofing protection action to Move message to the recipients' Junk Email folders in Office 365 Anti-phishing policies." If the message has multiple recipients, whether the tip is shown and to whom is based on a majority model. Verify that the configuration change was expected. Every Defender for Office 365 organization has a built-in anti-phishing policy named Office 365 AntiPhish Default that has these properties: To increase the effectiveness of anti-phishing protection in Defender for Office 365, you can create custom anti-phishing policies with stricter settings that are applied to specific users or groups of users. Select one of the following actions in the drop down list for messages from blocked spoofed senders: Quarantine the message: If you select this action, an Apply quarantine policy box appears where you select the quarantine policy that applies to messages that are quarantined by spoof intelligence protection. Enabling or disabling an anti-phish rule in PowerShell enables or disables the whole anti-phishing policy (the anti-phish rule and the assigned anti-phish policy). For detailed syntax and parameter information, see Get-AntiPhishRule. To enable or disable existing anti-phish rules, see the next section. You can search for entries using the Search box. Spam filter rule: Refers to the priority of the spam filter policy in addition to the recipients to whom the policy applies. On the confirmation page that appears, click Done. To go directly to the Anti-phishing page, use https://security.microsoft.com/antiphishing. I was recently working on a project implementing Microsoft Advanced Threat Protection (ATP) on Office 365 services for one of our clients and have come across a few lessons learnt that hopefully might become useful for others out there & also looking into this great new feature from Microsoft! Either way, yes, nothing is perfect. Office 365 Anti-Phishing Policy - DuoCircle Rule type: query. This setting is part of impersonation protection and is only available in Microsoft Defender for Office 365. User impersonation protection does not work if the sender and recipient have previously communicated via email. Deliver the message and add other addresses to the Bcc line: Deliver the message to the intended recipients and silently deliver the message to the specified recipients. For example, Valeria Barrios (vbarrios@contoso.com) might be impersonated as Valeria Barrios, but with a completely different email address. because I can see their is a limit of add 60 people to protect.. It seems the behavior differs with on-prem Exchanges (non Hybrid). When you later edit the anti-phishing policy or view the settings, the default quarantine policy name is shown. To remove an existing value, click remove next to the value. To remove an anti-phish policy in PowerShell, use this syntax: This example removes the anti-phish policy named Marketing Department. Will this help detect bogus DocuSign/DropBox/etc emails? I cant think of any good reason to turn them off, but at least you know the option is there if you need it. Creating an anti-phishing policy in PowerShell is a two-step process: To create an anti-phish policy, use this syntax: This example creates an anti-phish policy named Research Quarantine with the following settings: For detailed syntax and parameter information, see New-AntiPhishPolicy. However when trying to adjust the default policy, changes aren't taken into effect. At the top of the policy details flyout that appears, you'll see one of the following values: In the confirmation dialog that appears, click Turn on or Turn off. For the standard phishing emails, like an eBay or PayPal credential theft attempt, there are plenty of signals for EOP to look at. You need to be assigned permissions in Exchange Online before you can do the procedures in this article: For more information, see Permissions in Exchange Online. If you have multiple policies you can adjust their priority to determine which order theyre processed in. The new anti-phishing policies are included with Office 365 Advanced Threat Protection (ATP), which is an add-on license for Exchange Online Protection, or is also included in the Enterprise E5 license bundle. Please visit our Privacy Statement for additional information. Again, these are domains you want to protect from being impersonated. Office 365 Security and Compliance center: In the O365 Security and Compliance center, go to 'Reports' and see the 'Dashboard'. Enable intelligence based impersonation protection: This setting is available only if Enable mailbox intelligence is on (selected). I guess that makes sense, from a safety perspective. The following impersonation settings are only available in anti-phishing policies in Defender for Office 365: Enable users to protect: Prevents the specified internal or external email addresses from being impersonated as message senders. Different conditions or exceptions use AND logic (for example, and ). The message is checked for impersonation if the message is sent to a recipient that the policy applies to (all recipients for the default policy; Users, groups, and domains recipients in custom policies). Severity: medium. Custom policies always take precedence over the default policy, but you can change the priority (running order) of your custom policies. You open the Microsoft 365 Defender portal at https://security.microsoft.com. logs-o365*. After choosing a name for your policy, youll be asked to add users to protect. We're currently on a 90 day trial of MS Defender for our organization, after which I've asked for our subscription to update so that we can individual licenses to the user accounts. We can configure the tips by click Edit (or at least it appears we can): This setting helps the AI distinguish between messages from legitimate and impersonated senders. To enable or disable a policy or set the policy priority order, see the following sections. Repeat this step as many times as necessary. Microsoft Beefs up Email Protection with Office 365 Advanced Threat Protection Anti-phishing Policies. The policy is enabled (we aren't using the. For detailed syntax and parameter information, see Remove-AntiPhishPolicy. So, regardless of how many policies apply to a recipient, the maximum number of protected users (sender email addresses) for each individual recipient is 350. Getting the Most out of Microsoft Defender for Office 365 Policies We dont subscribe to EOP or ATP. Different conditions use AND logic (for example, and ). 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. We recommend that you turn this setting on by selecting the check box. In the dashboard, see 'Malware Detected in Email' and 'Spam Detections'. We are using Exchange on-prem not Exchange Online, not sure if there is a difference in behavior. And yet, hackers consistently innovate methods designed to bypass both security solutions. Back on the main policy page, the Status value of the policy will be On or Off. 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