Microsoft Defender for Endpoint
Endpoint protectionMicrosoft Defender Endpoint Releases
In brief
The release notes now list iOS build 1.1.82230103, released October 24, 2026, and direct administrators to allow required Microsoft Defender for Endpoint URLs through firewalls and proxies.
What Defender admins need to know
Review firewall and proxy allowlists to support device onboarding and continued operation.
Summaries are generated from the documentation change itself.
Documentation change
View on Microsoft LearnThe comparison below shows only the changed extract. Use the full-page view for complete context.
| macOS | 101.26092.0009 | October 2026 | - Release version: 20.126092.9.0- Engine version: 1.1.26060.12000- Signature version: 1.453.151.0 | Release details and updates | | Linux | 101.26091.0004 | October 2026 | - Release version: 30.126091.0004.0- Engine version: 1.1.26070.5001- Signature version: 1.457.364.0 | Release details and updates | | Android | 1.0.9406.0102 | Oct 2026 | - Build: 1.0.9406.0102- Release: Oct 23, 2026 | Release details and updates | | iOS | 1.1.82230103 | Oct 2026 | - Build: 1.1.82230103- Release: Oct 24, 2026 | Release details and updates | | macOS | 101.26082.0012 | October 2026 | - Release version: 20.126082.12.0- Engine version: 1.1.26100.3000- Signature version: 1.461.61.0 | Release details and updates | | Linux | 101.26091.0003 | October 2026 | - Release version: 30.126091.0003.0- Engine version: 1.1.26090.3000- Signature version: 1.461.35.0 | Release details and updates |
| Windows Antivirus | Platform 4.18.26090.9 / Engine 1.1.26090.9 | September 2026 | - Platform: 4.18.26090.9- Engine: 1.1.26090.9- Security intelligence: 1.461.1.0 | Release details and updates |
| --- | --- |
| Shared Device Management | Added [Preview] Silent running mode as a managed configuration for shared devices. Administrators can use SilentRunMode to enable (1) or disable (0, default) the setting. |
| General | Performance improvements and general bug fixes. |
| Connectivity update | Ensure the required Microsoft Defender for Endpoint URLs are allowed through your firewall and proxy servers to support device onboarding and ongoing operation. See Standard Device Connectivity URLs for the list of required URLs. |
Android | Sep 2026 | Platform: 1.0.9330.0101
| Feature Area | Update Summary |
|---|---|
| Improvements | Performance improvements and general bug fixes. |
| Connectivity update | Ensure the required Microsoft Defender for Endpoint URLs are allowed through your firewall and proxy servers to support device onboarding and ongoing operation. See Standard Device Connectivity URLs for the list of required URLs. |
iOS | Sep 2026 | Platform Version: 1.1.81160103
@@ -63,6 +63,7 @@ This table includes supported releases for all supported platforms in the past s | macOS | 101.26092.0009 | October 2026 | - Release version: 20.126092.9.0- Engine version: 1.1.26060.12000- Signature version: 1.453.151.0 | Release details and updates |
| Linux | 101.26091.0004 | October 2026 | - Release version: 30.126091.0004.0- Engine version: 1.1.26070.5001- Signature version: 1.457.364.0 | Release details and updates |
| Android | 1.0.9406.0102 | Oct 2026 | - Build: 1.0.9406.0102- Release: Oct 23, 2026 | Release details and updates |
+| iOS | 1.1.82230103 | Oct 2026 | - Build: 1.1.82230103- Release: Oct 24, 2026 | Release details and updates |
| macOS | 101.26082.0012 | October 2026 | - Release version: 20.126082.12.0- Engine version: 1.1.26100.3000- Signature version: 1.461.61.0 | Release details and updates |
| Linux | 101.26091.0003 | October 2026 | - Release version: 30.126091.0003.0- Engine version: 1.1.26090.3000- Signature version: 1.461.35.0 | Release details and updates |
| Windows Antivirus | Platform 4.18.26090.9 / Engine 1.1.26090.9 | September 2026 | - Platform: 4.18.26090.9- Engine: 1.1.26090.9- Security intelligence: 1.461.1.0 | Release details and updates |
@@ -1016,6 +1017,7 @@ See the full list of [Android UX improvements](android-new-ux). | --- | --- |
| Shared Device Management | Added **[Preview] Silent running mode** as a managed configuration for shared devices. Administrators can use `SilentRunMode` to enable (`1`) or disable (`0`, default) the setting. |
| General | Performance improvements and general bug fixes. |
+| Connectivity update | Ensure the required Microsoft Defender for Endpoint URLs are allowed through your firewall and proxy servers to support device onboarding and ongoing operation. See [Standard Device Connectivity URLs](/en-us/defender-endpoint/mtd#standard-device-connectivity-urls) for the list of required URLs. |
### Android | Sep 2026 | Platform: 1.0.9330.0101
@@ -1326,6 +1328,7 @@ For the latest UX improvements, see [iOS UX improvements](ios-new-ux). | Feature Area | Update Summary |
| --- | --- |
| Improvements | Performance improvements and general bug fixes. |
+| Connectivity update | Ensure the required Microsoft Defender for Endpoint URLs are allowed through your firewall and proxy servers to support device onboarding and ongoing operation. See [Standard Device Connectivity URLs](/en-us/defender-endpoint/mtd#standard-device-connectivity-urls) for the list of required URLs. |
### iOS | Sep 2026 | Platform Version: 1.1.81160103