Microsoft has announced support for Service Principals in Custom connectors, allowing authentication as a service principal instead of relying on user accounts. This feature is currently in Public Preview and enables seamless access for automated processes. The article provides a step-by-step guide on configuring service principal authentication in a custom connector for the Graph API with Application permissions to send emails. It covers setting up the service principal, creating a custom connector, creating an action to send emails, creating a connection, and sharing the connector. The article also explains the authentication flow for custom connectors with service principal authentication.
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