For instance, you received an e-mail message with an attachment of PDF in Outlook. Normally you can preview the attachment of PDF directly in the Reading Pane without downloading it. Click the attachment below the message header, and it previews the attachment of PDF as following screen shots shows.
But now when you single click on attachment in outlook, there is nothing happen without reading panel appearing in outlook.
This error may be caused by the “Turn off Attachment Preview” being enabled in the Trust Center in outlook. To work around it, follow the steps below to disable the Turn off Attachment Preview feature in outlook to enable previewing attachment in reading panel in outlook:
- In Outlook, select File > Options > Trust Center > Trust Center Settings, and then select Attachment Handling.
Note: In Outlook 2007, select Tools > Trust Center > Attachment Handling.
- Uncheck the checkbox for Turn off Attachment Preview, and then click OK and OK buttons.
This file cannot be previewed because the following previewer has been disabled in Outlook
How to preview PDFs in Outlook with single click