Upcoming retirement of older Microsoft Defender for Endpoint mobile app versions (iOS and Android)

Microsoft will retire Microsoft Defender for Endpoint mobile app versions released before February 2026 on iOS and Android starting May 10, 2026. Older versions will lose cloud connectivity and updates. Administrators must ensure devices update to supported versions to maintain protection and avoid service disruption. Introduction As part of our ongoing security hardening efforts, we have enhanced the security posture of the Microsoft Defender for Endpoint (MDE) mobile app. These security updates are available only in app versions released on or after February 2026. To ensure devices are protected by the latest security updates, reliability improvements, and platform capabilities, Microsoft will retire older MDE mobile app versions released prior to February 2026 on iOS and Android. When this will happen Microsoft will retire older MDE mobile app versions released before February 2026 starting on May 10, 2026. This change will be implemented in a phased manner across tenants. How this affects your organization Who is affected Microsoft 365 tenants with devices running Microsoft Defender for Endpoint mobile app versions released prior to February 2026 on iOS or Android. What will happen Mobile app versions released before the minimum supported builds listed below will be retired. Starting on May 10, 2026, retired app versions will no longer be able to: Connect to Microsoft Defender cloud services Receive protection or security updates Users must upgrade to a supported app version to continue using Microsoft Defender for Endpoint mobile protection. Minimum supported versions: Android: version 1.0.8605.0101 (rollout started February 9, 2026) iOS: version 1.1.73270102 (released February 2, 2026) What you can do to prepare To avoid service disruption prior to May 10, 2026, administrators should: No additional configuration changes are required beyond keeping the app version up to date. Compliance considerations Ensure all managed devices are updated to a supported version of the Microsoft Defender for Endpoint mobile app. Communicate this change to users who may be affected. Update internal documentation or helpdesk guidance to reflect this lifecycle change. No compliance considerations identified. Review as appropriate for your organization. Message ID: Upcoming retirement of older Microsoft Defender for Endpoint mobile app versions (iOS and Android)

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