Vista only supports EXCEL reports.
Vista 4 and 5
Vista reports only supports EXCEL format as a standard installation.
A PDF printer can be installed and set to auto save as a PDF file.
Vista can then print the report to the PDF printer which will save the file as a PDF.
To set this up you need to first install the PDF printer. PDFCreator is one printer option that can be set to auto save functionality.
Here is a link to download this software.
Once installed you configure the auto save option
Then in Vista setup the report to print to the PDFCreator
The setup the Report Periodical to print the report
This will then save the report as a PDF in the folder defined in the PDFCreator setup.