Use end-to-end encryption for Teams meetings
Note: End-to-end encryption is available as part of Teams Premium, an add-on license that provides additional features to make Teams meetings more personalized, intelligent, and secure. To get access to Teams Premium, contact your IT admin.
For meetings that require heightened confidentiality, end-to-end encryption 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, filters, and Q&A are not end-to-end encryption.
If your IT admin has enabled end-to-end encryption for your organization, you can use it to boost meeting security.
End-to-end meeting requirements
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The meeting organizer has to turn on end-to-end encryption before the meeting starts.
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You need to join from Teams for desktop (Windows and Mac), Teams Rooms, or mobile (iOS and Android). Channel meetings can also be end-to-end encryption.
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Other platforms: Web, Virtual Desktop, Direct Guest Join, and Cloud Video Interoperability (CVI) devices are not currently supported. If you try to join an end-to-end encryption meeting from one of these platforms, you'll be blocked.
Notes:
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During an end-to-end encrypted meeting, features including recording, live captions, transcription, together mode, large meetings, large gallery view on desktop, and PSTN aren't available.
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An end-to-end encrypted meeting is limited to 200 participants.
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An end-to-end encrypted meeting might take slightly longer to join.
Turn end-to-end encryption on or off
End-to-end encryption can be turned on or off before a meeting starts. The first time you turn on end-to-end encryption, make sure you’re using the latest version of Teams. To learn more, see Update Microsoft Teams.
To enable end to end encryption:
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Select Calendar
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Double-click an event.
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Select Edit
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If you double-clicked an instance of a meeting series, choose to edit This event, This and all following events, or All events in the series.
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Select Meeting options
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In Advanced protection
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Select Save.
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Select Calendar
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Select a meeting or event.
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Select Edit.
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In the meeting description, press and hold ctrl and select Meeting options.
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In Advanced protection
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Select Save.
Verify end-to-end encryption
To verify that encryption is working in your meeting, look for the encryption indicator: 
Note: This setting will synchronize across your other supported devices.
Turn end-to-end encryption on or off
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Open your Teams mobile app.
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Tap Calendar
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Tap a meeting.
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Tap See more > Meeting options.
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In Advanced protection
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Tap Save.
Verify end-to-end encryption
To verify that encryption is working in your meeting, look for the encryption indicator:
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