MC1484018 - Microsoft Defender for Identity auto-activation and auto-auditing automatic enablement

What and Why:

Microsoft Defender for Identity will automatically enable auto-activation and auto-auditing for eligible tenants using Defender for Identity sensor v3.x. Auto-activation helps activate eligible servers that are already onboarded to Microsoft Defender for Endpoint, and auto-auditing helps configure the required Windows event auditing.

This update supports enterprise-ready security operations by helping organizations complete Defender for Identity sensor activation and auditing setup with less manual configuration.

Rollout Schedule:

• General Availability, Worldwide: We will begin rolling out in late October 2026 and will roll out gradually.
• Before enablement begins, a banner will appear in the Microsoft Defender portal under Settings > Identities > Sensor management.

Impact on Your Organization:

Who is affected:

• Organizations using Microsoft Defender for Identity sensor v3.x.
• Security administrators who manage Microsoft Defender for Identity sensors and Microsoft Defender XDR settings.
• Servers already onboarded to Microsoft Defender for Endpoint that are eligible for Defender for Identity sensor activation.

Platforms/Services:

• Microsoft Defender for Identity.
• Microsoft Defender XDR portal.
• Microsoft Defender for Endpoint.

What will happen:

• Auto-activation will help activate eligible servers that are already onboarded to Microsoft Defender for Endpoint.
• Auto-auditing will help configure the required Windows event auditing for Defender for Identity.
• A banner will be shown in the Microsoft Defender portal before enablement starts.
• Admins can use the banner to opt out during the limited opt-out period.
• After the opt-out period ends and rollout starts, admins can still manually change the toggle status at any time in Settings > Advanced features.

Action Required/Recommendations:

• Review the banner in the Microsoft Defender portal if your organization wants to opt out before gradual rollout starts.
• Review your current Defender for Identity sensor activation and Windows event auditing configuration.
• Update internal security operations or deployment guidance if it references manual activation or auditing steps for Defender for Identity sensor v3.x.
• For special cases related to the feature or opt-out, contact the Defender for Identity support team.
• Learn more about sensor activation: https://learn.microsoft.com/en-us/defender-for-identity/deploy/activate-sensor.
• Learn more about automatic Windows event auditing: https://learn.microsoft.com/en-us/defender-for-identity/deploy/configure-windows-event-collection.

Compliance considerations: