Microsoft Power BI provides metadata for who generated or configured reports, datasets, and dataflows, which is then mapped to the source owner field. This has no connection to Microsoft Power BI workspace admins. You can refer to the API response schema to learn more:
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createdByin WorkspaceInfoReport -
configuredByin WorkspaceInfoDataset -
configuredByin WorkspaceInfoDataflow
The API does not return source owner metadata for other asset types due to limitations at source, see Microsoft Power BI documentation.
The value of the source owner is a string. While for sources like Looker, Atlan displays the username based on the metadata received, Microsoft Power BI APIs only return the user's email address, which is what Atlan displays for supported assets.
In certain cases, assets that are connected to the same Microsoft Power BI workspace and have the same source owner may display a different source owner or none at all. This is because Atlan maps it to the metadata returned by the APIs. For example, if the response is null, Atlan will not display a source owner.