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Microsoft Teams Blog
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Encryption in Microsoft Teams: June 2025

WillDixon's avatar
WillDixon
Icon for Microsoft rankMicrosoft
Aug 13, 2025
Microsoft Teams has become a critical platform for business communications, especially with the rise of remote and hybrid work models. With over 320 million monthly active users, Teams hosts sensitiv...
Updated Aug 13, 2025
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ThomasBinder's avatar
ThomasBinder
Iron Contributor
Aug 18, 2025

Would you mind sharing details on how the audio/video itself is encrypted in transit, especially when sending audio to an SBC? I did not find any comprehensive documentation that talks about SRTP encryption and which Cypher Suites are supported. The closest I found is https://learn.microsoft.com/en-us/microsoftteams/direct-routing-protocols-media mentioning AES_CM_128_HMAC_SHA1_80 respectively AES_CM_128_HMAC_SHA1_32 in the example at the bottom of the article.