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Today in Microsoft Defender

Every tracked change across Microsoft Defender documentation, in plain English. Browse the archive from 1 January 2026 → About this project →

Day in brief

Defender documents Android SilentRunMode and Mac Promotions-folder bulk-mail behavior

Two targeted Microsoft Learn updates shaped the period. Endpoint release notes document Silent running mode for Shared Device Management on Android: administrators set SilentRunMode to 1 to enable it, or 0—the default—to disable it. The anti-spam behavior matrix adds Outlook for Mac, stating that bulk mail below the BCL threshold can be delivered to Promotions and that permanently deleting the folder causes it to be recreated within a few minutes.

This period briefing was generated by AI from the tracked Microsoft Learn and Message Center changes.

2 updates

1

Microsoft Defender Endpoint Releases

New feature

The October 2026 Android release notes document Silent running mode for Shared Device Management. Administrators can set SilentRunMode to 1 to enable it or 0 (the default) to disable it.

1

Anti Spam Bulk Complaint Level Bcl About

Feature update

The behavior matrix adds Outlook for Mac and indicates that bulk mail below the BCL threshold can be delivered to the Promotions folder there. It also states that deleting the folder permanently causes it to be recreated within a few minutes.