M365 Changelog: (Updated) End-to-end encrypted Meetings – 200 participants (Premium)

MC679525 – Updated January 2, 2024: Microsoft has updated the rollout timeline below. Thank you for patience.

For meetings that require heightened confidentiality, end-to-end encryption (E2EE) is an extra layer of security that encrypts data at its origin and decrypts it at its destination. Only audio, video, and video-based screen sharing is end-to-end encrypted. Apps, avatars, reactions, chat, and Q&A are not end-to-end encrypted. 

Microsoft had launched end-to-end encryption (E2EE) for meetings with 50 participants in February 2023. Microsoft is increasing the meeting size to 200 participants. Microsoft supports:

• One can schedule an end-to-end encrypted meeting from desktop (Windows and Mac) and mobile (iOS or Android).
• To join an end-to-end encrypted meeting
  • One can join an end-to-end encrypted meeting from desktop (Windows or Mac) or mobile (iOS or Android) or Teams Room Device (Windows or Surface Hub).
  • For the 200-participant meeting, the first person joining should be from desktop (Windows or Mac) or mobile (iOS or Android).
  • All other platforms are blocked from joining an end-to-end encrypted meeting.

When this will happen:

• Standard Release: Microsoft will begin rolling out late October and expect to complete by early November.
• GCC Release: Microsoft will begin rolling out late October and expect to complete by early November.
• GCCH Release: Microsoft will begin rolling out early November and expect to complete by early January 2024 (previously mid-December).
• DoD Release: Microsoft will begin rolling out late November and expect to complete by early January 2024 (previously mid-December).

How this will affect your organization:

With this update, end-to-end encrypted meetings can have a meeting size up to 200 participants instead of 50 participants. 

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What you need to do to prepare:

Please inform your users that now end-to-end encrypted meetings support larger meeting size (i.e.,200 participants).

For more details how to use the feature, you can refer to: Use end-to-end encryption for Teams meetings – Microsoft Support

Additional information