Require end-to-end encryption for sensitive Teams meetings
APPLIES TO: 
Meetings 
Webinars Town halls
Some features described in this article require Teams Premium.
End-to-end encryption is the encryption of information at its origin and decryption at its intended destination without the ability for intermediate nodes to decrypt. When meetings in Teams are end-to-end encrypted, nobody except for the participants in the meeting can hear or see the communication. No other party, including Microsoft, has access to the decrypted conversation.
End-to-end encrypted meetings can be made between two parties when: the parties are using the latest version of the Teams desktop client for Windows or Mac or they are on a mobile device with the latest update for iOS and Android.
Web, Virtual Desktop (VDI), and Cloud Video Interoperability (CVI) devices aren't currently supported. Participants trying to join an end-to-end encrypted meeting from one of these platforms is blocked.
A maximum of 200 participants can attend an end-to-end encrypted meeting.
Note
End-to-end meeting encryption requires Teams Premium.
If you don't enable end-to-end encryption, Teams still secures meetings using encryption based on industry standards. Data exchanged during meetings is always secure while in transit and at rest. For more information, see Media encryption for Teams.
During an end-to-end encrypted meeting, Teams secures the following features:
Audio
Video
Screen sharing
Encryption in Microsoft 365 protects chat, file sharing, presence, and other content in the meeting. Apps, avatars, reactions, chat, and Q&A aren't end-to-end encrypted.
Some features aren't available during an end-to-end encrypted meeting, including:
Breakout rooms
Microsoft 365 Copilot in Teams meetings and events
Excel Live
Live captions and transcription
People dialing in by phone
PowerPoint Live
Recording
Request control of shared content
Together mode, companion mode, large gallery
If your organization uses compliance recording for 1:1 calls, end-to-end encryption isn't available. An individual who needs compliance recording can't join an end-to-end encrypted meeting. For more info on how Teams supports compliance recording, see Introduction to Teams policy-based recording for callings & meetings.
Manage who can create meetings with end-to-end encryption
The Teams admin enhanced encryption policies control end-to-end meeting encryption. It is on by default in the Global (Org-wide default) policy, allowing meeting organizers with a Teams Premium license to schedule meetings, including channel meetings, that use end-to-end encryption. You can update the default policy or create more policies as needed.
If the policy is turned on for a meeting organizer, you can enforce end-to-end meeting encryption by using a meeting template. Sensitivity labels can enforce end-to-end encryption even if the policy isn't enabled for the meeting organizer.
To manage the end-to-end meeting encryption policy, follow these steps:
In the Teams admin center, select Enhanced encryption policy.
Select the policy you want to update.
Set End-to-end meeting encryption, to Not enabled or Not enabled, but users can enable.
Select Save.