90-Day Reminder: Windows 11, version 23H2 Enterprise and Education editions reach end of updates on November 10, 2026

🚨 The Signal: Windows 11, version 23H2 Enterprise/Education editions reach end of updates on November 10, 2026. Devices will stop receiving critical security patches, increasing vulnerability to cyber threats. Upgrade to 25H2 is required to maintain security posture.

The Impact

All Windows 11 Enterprise/Education users are at risk if their devices are not updated, leading to unpatched vulnerabilities.

• Security Teams: Increased attack surface from unpatched OS vulnerabilities.
• IT Admins: Urgent need to plan and deploy OS upgrades across the environment.
• Organisational Leadership: Risk of data breaches and operational disruption due to insecure endpoints.

The Action

1. Identify all devices running Windows 11, version 23H2 Enterprise and Education editions.
2. Plan and schedule the upgrade of identified devices to Windows 11, version 25H2.
3. Utilise Microsoft Intune or other deployment tools to manage the upgrade process.
4. Verify successful upgrade and continued update reception for all devices.

Domain: Intune · Impact: high · Workload: Other · Essential Eight: Patch Operating Systems · ISM: ISM-1407, ISM-1501, ISM-1621, ISM-1622, ISM-1623, ISM-1654, ISM-1655, ISM-1694, ISM-1695, ISM-1696, ISM-1701, ISM-1702, ISM-1877, ISM-1889, ISM-1902