Safe Links About
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/safe-links-about.md.
Cross-product topic
Email and collaboration
A cross-product view of Microsoft Defender changes related to Email and collaboration.
Latest Email and collaboration changes
Microsoft Defender for Office 365: Enhancing how we handle promotional mail
Email and collaboration
Microsoft Defender for Office 365 will tag promotional emails as “promotions” and can auto-move them to a Promotions folder, learning user preferences over time. Public preview starts mid-April 2026; general availability begins late July 2026. Admins can configure settings, and users can train the system by moving messages.
Tenant Allow Block List Email Spoof Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/tenant-allow-block-list-email-spoof-configure.md.
Tenant Allow Block List About
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/tenant-allow-block-list-about.md.
Email Authentication Arc Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/email-authentication-arc-configure.md.
MDO Encrypted email attachment protection
Email and collaboration
Microsoft Defender for Office 365 will introduce an opt-in Safe Attachments policy to quarantine emails with password-protected attachments that cannot be scanned. Administrators can control release, users can self-release with passwords, and the feature supports various file types. Rollout begins August 2026 worldwide.
Zero Hour Auto Purge
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/zero-hour-auto-purge.md.
Address Compromised Users Quickly
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/address-compromised-users-quickly.md.
Advanced Delivery Policy Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/advanced-delivery-policy-configure.md.
Air Report False Positives Negatives
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/air-report-false-positives-negatives.md.
Allow or block files using the Tenant Allow/Block List
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/tenant-allow-block-list-files-configure.md.
Allow or block URLs using the Tenant Allow/Block List
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/tenant-allow-block-list-urls-configure.md.
Anti Malware Policies Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/anti-malware-policies-configure.md.
Anti Phishing Policies About
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/anti-phishing-policies-about.md.
Anti Phishing Policies Eop Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/anti-phishing-policies-eop-configure.md.
Anti Phishing Policies Mdo Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/anti-phishing-policies-mdo-configure.md.
Anti Spam Policies Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/anti-spam-policies-configure.md.
Anti Spoofing Spoof Intelligence
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/anti-spoofing-spoof-intelligence.md.
Assess and Tune your Filtering for Bulk Mail in Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/tune-bulk-mail-filtering-walkthrough.md.
Attack simulation training deployment considerations and FAQ
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/attack-simulation-training-faq.md.
Attack Simulation Training Payload Automations
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/attack-simulation-training-payload-automations.md.
Attack Simulation Training Payloads
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/attack-simulation-training-payloads.md.
Attack Simulation Training Simulation Automations
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/attack-simulation-training-simulation-automations.md.
Audit Log Search Defender Portal
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/audit-log-search-defender-portal.md.
Check your organization's anti-phishing policy DMARC settings
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/email-authentication-dmarc-configure.md.
Configuration Analyzer For Security Policies
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/configuration-analyzer-for-security-policies.md.
Configure and review priority account protection in Microsoft Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/priority-accounts-turn-on-priority-account-protection.md.
Configure Azure PIM for Microsoft Defender for Office 365 admin access
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/pim-in-mdo-configure.md.
Configure Junk Email Settings on Exchange Online Mailboxes
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/configure-junk-email-settings-on-exo-mailboxes.md.
Configure outbound spam policies for cloud mailboxes
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/outbound-spam-policies-configure.md.
Connection Filter Policies Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/connection-filter-policies-configure.md.
Connectors Detect Respond To Compromise
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/connectors-detect-respond-to-compromise.md.
Connectors Remove Blocked
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/connectors-remove-blocked.md.
Considerations for integrating non-Microsoft security services with Microsoft 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/mdo-integrate-security-service.md.
Create blocklists for inbound email in Microsoft 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/create-block-sender-lists-in-office-365.md.
Create Safe Sender Lists In Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/create-safe-sender-lists-in-office-365.md.
Detect and remediate illicit consent grants
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/detect-and-remediate-illicit-consent-grants.md.
Detect and remediate Outlook rules and custom forms injection attacks
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/detect-and-remediate-outlook-rules-forms-attack.md.
Email Authentication Arc Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/email-authentication-arc-configure.md.
Email security with Threat Explorer and Real-time detections in Microsoft Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/threat-explorer-email-security.md.
End-user notifications for Attack simulation training
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/attack-simulation-training-end-user-notifications.md.
Get started using Attack simulation training
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/attack-simulation-training-get-started.md.
Get Started with Defense In-Depth Configuration for Email Security
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/defense-in-depth-guide.md.
Global settings in Attack simulation training
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/attack-simulation-training-settings.md.
How email authentication works in Microsoft 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/email-authentication-about.md.
How to use DKIM for email in your custom domain
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/email-authentication-dkim-configure.md.
Landing pages in Attack simulation training
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/attack-simulation-training-landing-pages.md.
Login pages in Attack simulation training
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/attack-simulation-training-login-pages.md.
Mdo Ices Vendor Ecosystem
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/mdo-ices-vendor-ecosystem.md.
Mdo Portal Permissions
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/mdo-portal-permissions.md.
Mdo Sec Ops Guide
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/mdo-sec-ops-guide.md.
Message Trace Defender Portal
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/message-trace-defender-portal.md.
Outbound Spam Restore Restricted Users
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/outbound-spam-restore-restricted-users.md.
Preset Security Policies
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/preset-security-policies.md.
Quarantine Admin Manage Messages Files
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/quarantine-admin-manage-messages-files.md.
Quarantine End User
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/quarantine-end-user.md.
Quarantine Policies
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/quarantine-policies.md.
Quarantine Shared Mailbox Messages
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/quarantine-shared-mailbox-messages.md.
Respond to a compromised email account in Microsoft 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/responding-to-a-compromised-email-account.md.
Safe Attachments For Spo Odfb Teams Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/safe-attachments-for-spo-odfb-teams-configure.md.
Safe Documents In E5 Plus Security About
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/safe-documents-in-e5-plus-security-about.md.
Set up Safe Attachments policies in Microsoft Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/safe-attachments-policies-configure.md.
Set up Safe Links policies in Microsoft Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/safe-links-policies-configure.md.
Set up SPF to identify valid email sources for your Microsoft 365 domain
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/email-authentication-spf-configure.md.
Submissions Admin
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/submissions-admin.md.
Submissions Admin Review User Reported Messages
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/submissions-admin-review-user-reported-messages.md.
Submissions Outlook Report Messages
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/submissions-outlook-report-messages.md.
Submissions Teams
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/submissions-teams.md.
Submissions Users Report Message Add In Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/submissions-users-report-message-add-in-configure.md.
Submit malware, non-malware, and other suspicious files to Microsoft for analysis
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/submissions-submit-files-to-microsoft.md.
Teams message entity panel in Microsoft Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/teams-message-entity-panel.md.
Tenant Allow Block List About
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/tenant-allow-block-list-about.md.
Tenant Allow Block List Email Spoof Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/tenant-allow-block-list-email-spoof-configure.md.
Tenant Allow Block List Ip Addresses Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/tenant-allow-block-list-ip-addresses-configure.md.
Tenant Allow Block List Teams Domains Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/tenant-allow-block-list-teams-domains-configure.md.
Threat Explorer Investigate Delivered Malicious Email
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/threat-explorer-investigate-delivered-malicious-email.md.
Training campaigns in Attack simulation training
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/attack-simulation-training-training-campaigns.md.
Training modules for Training campaigns in Attack simulation training
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/attack-simulation-training-training-modules.md.
Trial User Guide Defender For Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/trial-user-guide-defender-for-office-365.md.
Try Microsoft Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/try-microsoft-defender-for-office-365.md.
Tune anti-phishing protection
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/anti-phishing-protection-tuning.md.
Tune Protection Settings in Microsoft Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/tune-microsoft-defender-for-office-365.md.
Understand detection technology within the email entity page in Microsoft Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/understand-detection-technology-in-email-entity.md.
Understand Overrides Within the Email Entity Page in Microsoft Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/understand-overrides-in-email-entity.md.
User reported settings
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/submissions-user-reported-messages-custom-mailbox.md.
User tags in Microsoft Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/user-tags-about.md.
Utilize Microsoft Defender For Office 365 In Sharepoint Online
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/utilize-microsoft-defender-for-office-365-in-sharepoint-online.md.
View email security reports in the Microsoft Defender portal
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/reports-email-security.md.
Zero Trust with Microsoft Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/zero-trust-with-microsoft-365-defender-office-365.md.
Air User Automatic Feedback Response
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/air-user-automatic-feedback-response.md.
Assess the impact of security configuration changes with Explorer
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/assess-the-impact-of-security-configuration-changes-with-explorer.md.
Configure Unified Rbac Defender Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/configure-unified-rbac-defender-office-365.md.
Defender For Office 365 Whats New
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/defender-for-office-365-whats-new.md.
Defender Office 365 Unified Rbac Permissions
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/defender-office-365-unified-rbac-permissions.md.
Enable Dmarc Reporting For Microsoft Online Email Routing Address Moera And Parked Domains
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/how-to-enable-dmarc-reporting-for-microsoft-online-email-routing-address-moera-and-parked-domains.md.
Handle False Positives In Microsoft Defender For Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/how-to-handle-false-positives-in-microsoft-defender-for-office-365.md.
How to configure quarantine permissions and policies
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/how-to-configure-quarantine-permissions-with-quarantine-policies.md.
How to handle malicious emails that are delivered to recipients (false negatives) using Microsoft Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/how-to-handle-false-negatives-in-microsoft-defender-for-office-365.md.
How to run attack simulations for your team
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/how-to-run-attack-simulations-for-your-team.md.
How to set up automated attacks and training in Attack simulation training
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/how-to-setup-attack-simulation-training-for-automated-attacks-and-training.md.
Mdo Portal Permissions
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/mdo-portal-permissions.md.
Optimize and correct threat policies with configuration analyzer
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/optimize-and-correct-security-policies-with-configuration-analyzer.md.
Prioritize and manage Automated Investigations and Response (AIR)
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/how-to-prioritize-and-manage-automated-investigations-and-response-air.md.
Roles and role groups in Microsoft Defender for Office 365 and Microsoft Purview
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/scc-permissions.md.
Set up steps for the Standard or Strict preset security policies in Microsoft Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/ensuring-you-always-have-the-optimal-security-controls-with-preset-security-policies.md.
Steps to use manual email remediation in Threat Explorer
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/search-for-emails-and-remediate-threats.md.
Tenant Allow Block List Teams Domains Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/tenant-allow-block-list-teams-domains-configure.md.
Understanding detection technology in the email entity page of Microsoft Defender for Office 365
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/step-by-step-guides/understand-detection-technology-in-email-entity.md.
Address compromised user accounts with automated investigation and response
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/address-compromised-users-quickly.md.
Admin review for user reported messages
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/submissions-admin-review-user-reported-messages.md.
Allow or block IPv6 addresses using the Tenant Allow/Block List
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/tenant-allow-block-list-ip-addresses-configure.md.
Anti Malware Policies Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/anti-malware-policies-configure.md.
Anti Phishing Policies About
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/anti-phishing-policies-about.md.
Anti Phishing Policies Eop Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/anti-phishing-policies-eop-configure.md.
Anti Phishing Policies Mdo Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/anti-phishing-policies-mdo-configure.md.
Anti Spam Policies Configure
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/anti-spam-policies-configure.md.
Anti Spam Policies Troubleshooting
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/anti-spam-policies-troubleshooting.md.
Audit log search in the Microsoft Defender portal
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/audit-log-search-defender-portal.md.
Block domains and addresses in Microsoft Teams using the Tenant Allow/Block List
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/tenant-allow-block-list-teams-domains-configure.md.
Configuration analyzer for threat policies in cloud organizations
Email and collaboration
Updated Microsoft Defender documentation in defender-office-365/configuration-analyzer-for-security-policies.md.