Full Error Message:

Export to PowerPoint is not available on the SharePoint web application because it is configured to used the 'Forms' authentication method. Export to PowerPivot requires the 'Windows' authentication method

Steps to reproduce

  1. Create a SharePoint site that is configured for Forms authentication.
  2. Upload your favorite PowerPivot model to a document library on the SharePoint site.
  3. Create a Power View report based on the PowerPivot model and save the report.
  4. Select the 'Export to PowerPoint' command in Power View.

More Information

Exporting from Power View to PowerPoint is currently not supported for SharePoint web applications configured for Forms Authentication.

For additional troubleshooting information, see Power View FAQ, Troubleshooting, Tips, and Tricks.