PROTECTED MEETINGS
End-to-end encryption (E2EE)
Overview and Benefits
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.
• Secures the audio, video and screen sharing content in the meeting.
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• Ensures only participants in the meeting can hear or see the communication.
Note:
No other party, including Microsoft, has access to the decrypted conversations.
Feature Visibility
E2EE is visible to all meeting participants if you as the organizer has a Teams Premium
license.
Dependencies and Limitations
When the E2EE option is enabled for meetings, it introduces feature and functionality
tradeoffs. For this reason, the E2EE option should be used for very specific and targeted
use cases defined by the customer's IT, Security and/or Compliance teams. E2EE can
impact both the user experience and IT’s ability to govern the meeting.
• Supports 50 participants maximum
• E2EE communications become non-discoverable in compliance tooling. Participants that
are configured with a compliance recording policy will be unable to join.
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• An end-to-end encrypted meeting might take slightly longer to join.
• The below features become unavailable in Teams meetings when E2EE is enabled:
o Recording
o Live captions, CART captions and transcription
o Language interpretation
o Companion mode
o Together mode and Large Gallery views
o PSTN Scenarios
o Breakout rooms
o PowerPoint Live
o Excel Live
Note: When E2EE is not used, Teams data exchanged during calls or meeting is still protected with industry standard
encryption in transit and at rest. Chat for end-to-end encrypted calls / meetings is protected with M365 encryption.
For more information, see Media encryption for Teams.
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Apps, avatars, reactions, chat, and Q&A are not end-to-end encrypted, but are still secured with encryption.