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Copy file name to clipboardExpand all lines: defender-office-365/recommended-settings-for-eop-and-office365.md
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description: What are best practices for Exchange Online Protection (EOP) and Defender for Office 365 security settings? What's the current recommendations for standard protection? What should be used if you want to be more strict? And what extras do you get if you also use Defender for Office 365?
- ✅ <a href="https://learn.microsoft.com/defender-office-365/mdo-about#defender-for-office-365-plan-1-vs-plan-2-cheat-sheet" target="_blank">Microsoft Defender for Office 365 Plan 1 and Plan 2</a>
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|**Set a daily message limit** (_RecipientLimitPerDay_)|0|1000|800|The default value 0 means use the service defaults.|
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|**Restriction placed on users who reach the message limit** (_ActionWhenThresholdReached_)|**Restrict the user from sending mail until the following day** (`BlockUserForToday`)|**Restrict the user from sending mail** (`BlockUser`)|**Restrict the user from sending mail** (`BlockUser`)||
|**Send a copy of outbound messages that exceed these limits to these users and groups** (_BccSuspiciousOutboundMail_ and _BccSuspiciousOutboundAdditionalRecipients_)|Not selected (`$false` and Blank)|Not selected (`$false` and Blank)|Not selected (`$false` and Blank)|Microsoft SecureScore now recommends this be configured, in the recommendation "Ensure Exchange Online Spam Policies are set to notify administrators". <br><br> This setting works only in the default outbound spam policy. It doesn't work in custom outbound spam policies that you create.|
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|**Notify these users and groups if a sender is blocked due to sending outbound spam** (_NotifyOutboundSpam_ and _NotifyOutboundSpamRecipients_)|Not selected (`$false` and Blank)|Not selected (`$false` and Blank)|Not selected (`$false` and Blank)|The default [alert policy](/purview/alert-policies#threat-management-alert-policies) named **User restricted from sending email** already sends email notifications to members of the **TenantAdmins** group (**Global Administrator** members) when users are blocked due to exceeding the limits in policy. Microsoft SecureScore now recommends this be configured. For instructions, see [Verify the alert settings for restricted users](outbound-spam-restore-restricted-users.md#verify-the-alert-settings-for-restricted-users).|
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|**Send a copy of outbound messages that exceed these limits to these users and groups** (_BccSuspiciousOutboundMail_ and _BccSuspiciousOutboundAdditionalRecipients_)|Not selected (`$false` and Blank)|Not selected (`$false` and Blank)|Not selected (`$false` and Blank)|This setting works only in the default outbound spam policy. It doesn't work in custom outbound spam policies that you create. <br><br> The Microsoft SecureScore recommendation **Ensure Exchange Online Spam Policies are set to notify administrators** suggests that you configure this value.|
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|**Notify these users and groups if a sender is blocked due to sending outbound spam** (_NotifyOutboundSpam_ and _NotifyOutboundSpamRecipients_)|Not selected (`$false` and Blank)|Not selected (`$false` and Blank)|Not selected (`$false` and Blank)|The default [alert policy](/purview/alert-policies#threat-management-alert-policies) named **User restricted from sending email** already sends email notifications to members of the **TenantAdmins** group (**Global Administrator** members) when users are blocked due to exceeding the limits in policy. For instructions, see [Verify the alert settings for restricted users](outbound-spam-restore-restricted-users.md#verify-the-alert-settings-for-restricted-users). <br><br> The Microsoft SecureScore recommendation **Ensure Exchange Online Spam Policies are set to notify administrators** suggests that you configure this value.|
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