Requesting an OAuth2 access token via the Resource Owner Password Credentials flow, then using that Bearer token against a custom projection's endpoint on the INTEGRATION cluster, returns 401 Unauthorized — while using Basic Authentication with IFS credentials against the same endpoint works fine. Is OAuth2 simply not supported for custom projections?

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Answer

OAuth2 is only applicable to projections accessed through the MAIN cluster — when accessing a projection endpoint on the INTEGRATION cluster specifically, Basic Authentication is required instead, regardless of whether a valid OAuth2 token has been obtained. This is why the exact same OAuth2 Bearer token that would work against a main-cluster endpoint returns 401 when used against an integration-cluster endpoint for the same projection.

Documentation-based answer. Confirm the product and release before applying it. This answer has not been verified in an IFS environment.

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