When the PDF export option saves a report as a PDF file, it uses the information stored in the Report Builder fonts used in the report to create character mappings within the PDF file. If the font used in the report is not installed on the report server, the resulting PDF file might not contain the correct mappings and might not display correctly when viewed. In addition, the computer that you use to view the report must also have the correct font installed. If the font is not installed, the report might not display correctly.
Differences in PDF output occur most often when the report uses Arial and it includes non-Latin characters. Before sharing your report as a PDF file, you should test the PDF file on several different computers to verify that the report appears correctly.