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Make sure that “Turn off Attachment Preview” box is unchecked.

In Outlook, navigate through “File > Options > Trust Center > Trust Center settings > Attachment Handling” and: Making Sure That "PDF Preview Handler" is Enabled

Delete all files/folders in those paths after preferably backing up them.ģ.

%userprofile%\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.Outlook\

Copy these paths and paste into there respectively:.

Restart Outlook and check if you can preview PDF attachments now.Ĭorruptions and similar problems with the temporary/cache files might be the reason behind this issue.

Make sure that it's the default app to open PDF files.

You can download and install the latest versionĪdobe Reader or try updating it. Installing the Latest Version of Adobe Reader

You can follow the troubleshooting steps below: 1. Preview, it fails and you receive this error message: "This file cannot be previewed because of an error with the following previewer: PDF Preview Handler." When you want to preview a PDF attachment in the reading pane in Outlook and click