Which feature allows Users to combine data in OneStream with Microsoft Office programs?

The feature that allows Users to combine data in OneStream with Microsoft Office programs is typically the Spreadsheet/Excel Add-In. This tool integrates OneStream with Excel, enabling users to retrieve, analyze, and manipulate data directly in their spreadsheets. The integration facilitates a seamless experience where data from OneStream can be presented and further highlighted using Excel's advanced features, such as formulas and charts.

Extensible Documents, while useful for creating and customizing reports, do not directly allow the same interactive data manipulation capabilities with Excel as the Spreadsheet/Excel Add-In does. Instead, Extensible Documents are more focused on document creation and formatting within OneStream rather than data integration with external applications.

Cube Views and Dashboards serve different purposes within OneStream, primarily addressing data visualization and structured reporting. Cube Views help users slice and dice data for analytical purposes and Dashboards present this information in a more summarized visual format, but neither provides the direct and interactive linkage needed for Excel-based manipulation.

Thus, the Spreadsheet/Excel Add-In stands out as the correct choice for its ability to effectively merge OneStream data with the robust functionalities of Microsoft Excel.