# Microsoft Teams Can Detect Recording Apps and Notify Other Participants

> Source: <https://xusheng.dev/posts/reversing/teams_external_recording_detector/main/>
> Published: 2026-08-31 00:00:00+00:00

## TL;DR

- Teams has a feature that can detect third-party recording and AI note-taking applications during a meeting
- On Windows and macOS, it enumerates running processes every 30 seconds and compares their names with a classification table
- The local user sees the detected application name
- Eligible meeting participants are told which participant may be recording, but not which application was found
- Separate Microsoft telemetry contains the matched app name, type, and risk level
- Microsoft can update the table remotely through its Experimentation and Configuration Service (ECS)
- It only runs in meetings where the host organization’s policy enables it; the default is off
- This detector is separate from Teams’ “Prevent screen capture” feature