Data source authentication
In addition to configuring a Scheduled refresh, report server administrators can use the Manage page to modify the data source properties of a report. For example, Power BI reports based on Live connections to SQL Server Analysis Services (SSAS) models will attempt to access the SSAS source as the user viewing the report by default. However, assuming that the SSAS instance is installed on a separate machine than the Power BI Report Server, Kerberos Constrained Delegation (KCD) is required for this impersonation to function. To enable this data source connection without KCD, while still respecting any row-level security defined in the SSAS model, an administrator can modify the data source properties of the report. ...
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