Purview on-demand classification "cost-estimation" still in progress!

The useful distinction here is between the scan’s supported scope and evidence that your particular estimation is progressing. Microsoft documents the 100-million-file and 150,000-location limits as enforced from scan estimation results. An estimated 80 million matching files would be below the file cap; the tenant’s total inventory alone is not that estimate. Check the configured last-modified date range, rather than assuming it means creation date.

For estimation, IncludeImpactAssessment refreshes status; IncludeScanProgress refreshes classification status. IncludeProgressForAllActiveScans is reserved for Microsoft’s internal use. Check View estimation > Estimation overview for progress and items found.

The documentation does not define ImpactAssessmentInvalid or establish a SharePoint/OneDrive daily throughput guarantee. Do not import auto-labelling limits. Given your empty timestamps, preserve the scan ID and outputs and request Microsoft support to inspect the backend state before cancelling. Those fields cannot confirm active processing.