MSGraph API - Connected System Authorization Successful but integration object authorization failed.

 I've tested Azure AD Graph API functions using Postman outside Appian, it's successful.

Created the HTTP connected system object with inputs ClientID, Client Secret and Token Request Endpoint. - Authentication: OAuth 2.0 client credentials Grant.- Tested using "Authorize" button. "Authorization Successful".

However, when testing Integration Object using above HTTP connected system object, getting an "Invalid credentials" error . Any suggestions pls? Thanks.

Invalid credentials

error-result-guidance

Appian was not able to authenticate with the access token you provided. This request requires Bearer authentication. HTTP/1.1 401 Unauthorized Next Steps

  • This integration is using a connected system with OAuth 2.0 Client Credential authentication configured. You may need to authorize access to the external system and retry the request.
  • Make sure that you are using the correct OAuth 2.0 configuration for this external system
  • Make sure that the OAuth 2.0 configuration provides the required scope to make this request
  • Check the request and response for more details
  • Review the external system’s documentation for information on what may have caused the problem

HTTP Request:

GET /v1.0/users HTTP/1.1 Authorization: Bearer ****** Host: graph.microsoft.com Connection: Keep-Alive User-Agent: Appian Accept-Encoding: gzip,deflate

HTTP Response:

HTTP/1.1 401 Unauthorized Date: Sun, 04 Jul 2021 05:36:22 GMT Content-Type: application/json Transfer-Encoding: chunked Vary: Accept-Encoding WWW-Authenticate: Bearer realm="", authorization_uri="">login.microsoftonline.com/.../authorize", client_id="00000003-0000-0000-c000-000000000000" Strict-Transport-Security: max-age=31536000 request-id: ef4ec847-5229-4ff6-b9c7-fc8586a7bba9 client-request-id: ef4ec847-5229-4ff6-b9c7-fc8586a7bba9 x-ms-ags-diagnostic: {"ServerInfo":{"DataCenter":"UK South","Slice":"E","Ring":"3","ScaleUnit":"000","RoleInstance":"LN2PEPF00003306"}}

{"error":{"code":"InvalidAuthenticationToken","message":"Access token validation failure. Invalid audience.","innerError":{"date":"2021-07-04T05:36:23","request-id":"ef4ec847-5229-4ff6-b9c7-fc8586a7bba9","client-request-id":"ef4ec847-5229-4ff6-b9c7-fc8586a7bba9"}}}

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