Ever since I upgraded to Outlook 2016 my attachment PDF Previewer has stopped working with the message
This file cannot be previewed because of an error with the following previewer:
PDF Preview Handler
To open this file in its own program, double-click it.
I tried these fixes without any luck:
- Reinstalled the latest Adobe Reader.
- Ran this registry fix.
- LAN Settings
- Turning off all previewers and/or enabling PDF Preview Handler.
- Cleaning out the TEMP and Cache folders.