My Windows 10 networking stack died recently, requiring a rescue repair-install from a USB key. Everything is now working fine except I am no longer able to preview Office documents in Outlook 365. The error for Word is:
This file cannot be previewed because of an error with the following previewer: Microsoft Word previewer
Same issue with Excel and PowerPoint. PDF previews still work fine (using Acrobat), so it's not a mere of all previews being broken.