Content Understanding Studio: Powerpoint und Excel

Question

Content Understanding Studio generates wrong output format for *.xlsx and *.pptx.

-> Slides / Sheets are ignored.

This Powerpoint had 6 Slides:

{
	"id": "c5d5a346-6e36-43af-98af-9ae7d3605fdc",
	"status": "Succeeded",
	"result": {
		"analyzerId": "prebuilt-layout",
		"apiVersion": "2025-11-01",
		"createdAt": "2026-08-06T08:32:47Z",
		"stringEncoding": "codePoint",
		"warnings": [],
		"contents": [
			{
				"path": "input1",
				"markdown": "AAAAAA\n\BBBBBBBB\n\nCCCCCCC\n\nDDDDDDDD\n\nEEEEEEEE\n\nFFFFFFF\n",
				"kind": "document",
				"startPageNumber": 1,
				"endPageNumber": 1,
				"analyzerId": "prebuilt-layout",
				"mimeType": "application/zip"
			}
		]
	},
	"usage": {
		"documentPagesMinimal": 1
	}
}

https://learn.microsoft.com/en-us/azure/ai-services/content-understanding/document/elements

For spreadsheets like Excel, each sheet is mapped to a page. For presentations, like PowerPoint, each slide is mapped to a page. For file formats like HTML or Word documents, which lack a native page concept without rendering, the entire main content is treated as a single page.

Bug in Content Understanding? This "bug" occurs in the API and also in https://contentunderstanding.ai.azure.com/tryout?analyzerId=prebuilt-layout