Power BI officially rejects third-party data models
Microsoft has confirmed that Power BI will not support connections to third-party semantic models. According to the Microsoft Fabric Customer Advisory Team, architectural differences make it impossible to reliably connect external metric layers to Power BI using standard XMLA or SQL Server Analysis Services connectors. The limitation affects both Import and DirectQuery modes. When external models use non-standard table structures or complex post-aggregation calculations, Power BI fails to translate the queries correctly. As a result, organisations using external tools to define their business logic cannot simply plug Power BI in as a display layer. Analysts must recreate those specific metrics and calculations natively within Power BI using DAX.
Until now, many IT departments hoped to build a single universal metrics layer in an external tool and let business users connect to it with whatever software they preferred. The dream was that you could plug Power BI into this central brain, drag and drop visuals, and completely avoid writing complex DAX formulas or building a data model from scratch. That shortcut is officially dead. Microsoft is enforcing a strict boundary: if you want to use Power BI as your presentation layer, you must use it as your modelling layer too. For analysts caught between IT databases and leadership's demand for interactive dashboards, this means you cannot outsource the hard work of data modelling. You have to build the relationships and write the DAX yourself.
Analysis
Stop hoping IT will hand you a pre-built connection that magically solves your DAX problems. Accept that Power BI requires its own data model to function properly. Organise your raw data into clean, connected tables directly inside Power BI Desktop, and learn the basic CALCULATE formulas required to build those metrics yourself.
Source note
Pulse published by Collab365 Spaces. Cite as "Power BI officially rejects third-party data models", Collab365 Spaces.