In the rapidly evolving world of business intelligence, speed and granularity are the two pillars of success. For years, organizations have leveraged Power BI DirectQuery performance to handle massive datasets without the need for data duplication. However, a common friction point remained: the inability to drill down into underlying details when using the “Analyze in Excel” feature. As of late 2025, Microsoft has officially removed this barrier. This update marks a significant milestone for enterprise data architecture, allowing users to seamlessly transition from high-level summaries in a PivotTable to row-level details, all while maintaining a live connection to the source.
The Evolution of Direct Connection Reporting
Historically, the “Show Details” feature in Excel—a favorite for accountants and analysts—was exclusive to Import models. If you were running a DirectQuery or Direct Lake model to maintain real-time visibility, double-clicking a cell would often result in an error or an empty sheet.
By enabling MDX DRILLTHROUGH support for these live connection types, Power BI has unified the user experience. Whether your data is sitting in a local import or a high-performance OneLake Direct Lake environment, the workflow remains identical. This is a game-changer for business intelligence consulting teams who previously had to choose between data freshness and analytical depth.
Why This Matters for Enterprise Data Strategy
The shift toward “Live Data” is not just a trend; it is a necessity for modern decision-making. Here is why the inclusion of drillthrough for DirectQuery and Direct Lake models is essential:
1. Eliminating the “Import Mode” Tax
Previously, if an executive needed to see the specific invoices making up a total in Excel, architects were often forced to use Import mode. This meant managing refresh schedules and dealing with data latency. Now, you can keep your data at the source, ensuring that your Power BI DirectQuery performance remains high while still providing the granular “Show Details” functionality.
2. Maintaining Robust Security Frameworks
One of the biggest concerns with data exploration is security. This new update respects Power BI Row Level Security (RLS) and Object Level Security (OLS) implicitly. When a user double-clicks a cell in Excel to drill through, the query sent to the model is filtered by their specific security role. They only see the rows they are authorized to see, providing a secure environment for sensitive financial or HR data.
3. Streamlining the User Experience
Excel remains the “lingua franca” of data analysis. By allowing users to stay within their preferred tool while accessing live Power BI semantic models, organizations can increase BI adoption. There is no longer a need to jump back into the Power BI Service just to see the underlying transactions.
Technical Optimization for DirectQuery Drillthrough
While the feature is now supported “out of the box,” achieving optimal performance requires a strategic approach to Power BI data modeling.
DAX Formula Optimization and Detail Rows
To ensure that the drillthrough experience is fast, it is vital to utilize DAX Formula Optimization. Complex measures can slow down the retrieval of detail rows. Furthermore, developers should define “Detail Rows Expressions” within the semantic model. This allows you to control exactly which columns are displayed when a user drills through in Excel, preventing the “Select *” problem that can bog down source systems like SQL Server or Snowflake.
The Role of Star Schema
Even with live connections, the underlying structure matters. Implementing a Power BI Star Schema Design ensures that the relationships between facts and dimensions are efficient. When Excel requests a drillthrough, a well-organized schema allows the engine to generate cleaner join statements, significantly boosting the responsiveness of the data retrieval.
Case Study: Real-Time Financial Auditing
Consider a global retail firm using Tableau for finance dashboards for high-level visualization, but relying on Excel for month-end reconciliation.
- The Challenge: The audit team needed to verify specific transactions totaling millions of dollars. Because the data was too large to import, they used DirectQuery. However, they couldn’t see the specific line items in Excel.
- The Solution: By leveraging the new drillthrough support, the team connected Excel directly to their Power BI semantic model. They could now double-click any discrepancy in their PivotTable and see the raw transaction data instantly.
- The Result: Audit time was reduced by 40%, and the need for manual data exports was completely eliminated.
Best Practices for Implementation
To make the most of this update, consider the following roadmap:
- Evaluate Your Model Type: If you are on Fabric, prioritize Direct Lake for the best balance of speed and detail. If you are using external SQL databases, ensure your Power BI DirectQuery performance is tuned at the source (e.g., proper indexing).
- Define Explicit Measures: Drillthrough works best with explicit DAX measures rather than implicit ones. This provides better control over the context of the data being retrieved.
- Monitor Query Complexity: Use tools like DAX Studio or Performance Analyzer to see the impact of drillthrough queries on your source system. DirectQuery performance is often limited by the “weakest link”—the source database’s ability to handle the incoming SQL.
- Update Your Training: Ensure your analysts know that “Show Details” is now a viable option for live models. This simple education step can significantly reduce requests for manual data pulls.
Conclusion: A Unified Future for BI
The removal of the drillthrough limitation for Direct Lake and DirectQuery models is a clear signal that the gap between “high-level dashboarding” and “deep-dive analysis” is closing. At VisualizExpert, we specialize in bridging this gap, ensuring that your Power BI reporting solutions are not only beautiful but also functionally deep and technically optimized.
By embracing these live connection workflows, your organization can move away from stale data and toward a truly reactive, data-driven culture. The ability to see the “why” behind the “what” in Excel—without sacrificing the benefits of a live semantic model—is a massive win for the modern enterprise.
Take Your Analytics Further
If you are struggling with slow reports or unable to see the details behind your data, then don’t waste another day fighting with rigid data models that limit your perspective.
At VisualizExpert, we provide the custom Power BI consulting and analytics strategy services you need to turn complex data into a competitive advantage. From DAX Formula Optimization to Enterprise BI Managed Services, we ensure your data works for you, not the other way around.




