Update docs on OnBehalfOf authentication flow #1617
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Updates guidance on on-behalf-of flow.
Previous description insinuated that an access token for Microsoft Graph could be re-used as an assertion, however this leads to an
invalid_grant
error when the same token is used as theassertion
in the on-behalf-of flow.On-behalf-of flow expects the initial access token issued to have an audience (
aud
) claim of the intermediary API then the intermediary can exchange the assertion for a Microsoft Graph access token.This PR updates the description to reflect this better & links to various resources.
Azure Identity docs are not very clear about setting this up.
closes #1472
closes #1607
Microsoft Reviewers: Open in CodeFlow