Microsoft Teams transcription via API

Microsoft Teams transcription through the Graph API is designed primarily for post-meeting workflows, as transcripts become available only after processing completes and are retrieved as VTT files with utterance-level timestamps and basic speaker labels. Access requires an Entra ID application, OAuth client-credentials authentication, administrator-approved meeting and transcript permissions, and optional change notifications to trigger retrieval when meetings end. The native service can support archiving, summaries, and CRM updates, but the source describes limitations in real-time access, throttling, multilingual and accented-speech accuracy, speaker attribution during overlap, and the lack of word timestamps, confidence scores, and structured audio-intelligence data. For live captioning, agent assistance, or more detailed downstream AI processing, it recommends using a custom Teams bot based on the Microsoft Graph Communications Media SDK to capture PCM audio over WebRTC and send it to an external speech-to-text provider. Such integrations require Azure-hosted infrastructure, media permissions, port configuration, recovery logic, and participant-to-speaker and timestamp alignment with Teams metadata. The text also emphasizes evaluating vendors on production-specific word error rate, language support, diarization quality, data handling, compliance, feature pricing, and ongoing operational costs.

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