If a user states they're unable to preview PDF's in Outlook have them complete the following steps:
- Open Acrobat. On the Edit menu, choose Preferences.
- In the Preferences dialog box, choose General in the Categories list, and then select the Enable PDF thumbnail previews in Windows Explorer check box.
- Click OK.
Wait for a few seconds while Acrobat is configured to show thumbnail previews in Windows Explorer.
- In Acrobat Reader, you see a prompt asking for the feature to be added to the current installation. Click Yes to confirm.