Antti K. Koskela 9/2/2025

M365 Agents SDK SSO broken - how to fix it?

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This technical article addresses a common issue where Single Sign-On (SSO) fails in bots or agents built with the M365 Agents SDK for Microsoft Teams and Copilot. It details the author's experience with a specific SSO breakdown in a sample bot, walks through the error symptoms, and explains the root cause and solution for getting delegated Graph API permissions to work correctly.

M365 Agents SDK SSO broken - how to fix it?

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