Defining RLS Roles and Filter Expressions
Data security should always be top of mind and BI teams and developers should strive to ensure that users are never granted greater access or permission than is necessary to perform a legitimate business function.
In the context of Power BI projects, the question "Who should be able to see what?" should be well defined and documented before any reports are published or read access to the dataset is granted. Additionally, there should be a well-defined process for creating and managing the security groups used in security implementations.
The data security of Power BI models comprises security roles defined within the model, with each role containing a unique set of one or more DAX filter expressions. Roles and their associated filter expressions are created in Power BI Desktop, and users or groups are mapped to security roles in the Power BI service. A single DAX filter expression can be applied to each table of a model within...