"Where we add this in the above query...

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"Where we add this in the above query................. iif( Fields!Customer_Customer_Customer_UNIQUE_NAME.Value is Nothing , "[Customer].[Customer].[All Customers]" , Fields!Customer_Customer_Customer_UNIQUE_NAME.Value) " Right click on the dataset, properties, Fields, Add, Calculated field. Then go to the parameter, right click properties and use that calculated field as the Label field on the available values.