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There are multiple layers of encryption at work within Microsoft 365. Encryption in Teams works with the rest of Microsoft 365 encryption to protect your organization's content.

End-to-end Encryption

For situations that require heightened confidentiality, Teams offers end-to-end encryption (E2EE) for one-on-one calls. With E2EE, call information is encrypted at its origin and decrypted at its intended destination so that no information can be decrypted between those points.

    Audio

    Video

    Screen sharing

Teams data is encrypted in transit and at rest in Microsoft data centers using industry-standard technologies, such as TLS and SRTP. This includes calling, messages, files, meetings, and other content. See Encryption for Teams for details.

Initially, E2EE is available only for one-on-one Teams calls. But after gathering customer feedback to understand how the feature addresses their compliance needs and obligations, Microsoft is going to work to bring E2EE capabilities to online meetings.

Office 365 Defender is an optional add-on licensing structure within Office 365 to enable higher security within Teams itself, as well as within other applications within Microsoft 365 suite. Office 365 Defender:

    Reduces the amount of spam you receive

    Protects you against the consequences of clicking on malicious links

    Defends you against phishing attacks

    Allows you to attach files safely to chats

    Defends all users from malicious links that get shared through chats and files

    Protects you against malware in attachments