Adobe Acrobat Reader and PowerToys are causing a little trouble for Outlook.
[h=2]What you need to know[/h]
Full story from the WindowsCentral blog...

[h=2]What you need to know[/h]
- There's an Outlook bug in the wild wherein PDF previews won't display properly.
- Microsoft attributes the bug to two primary situations: A conflict with PowerToys or an issue with Adobe Acrobat Reader installation bitness.
- There are workarounds available for the two aforementioned scenarios.
Full story from the WindowsCentral blog...