In this post, Premier Dev Consultant Marius Rochon show us how to obtain extra access tokens using OAuth2 Extension flow (on-behalf-of flow).
The following describes an approach for getting access tokens to more than one resource, without re-displaying the sign in dialog (using the V2 Azure AD endpoint). In a nutshell, the procedure uses the existing authentication dialog to acquire one token and then the OAuth2 Extension flow (on-behalf-of flow) to acquire additional access tokens with the originally acquired token.
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