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This file cannot be previewed because there is no previewer installed for it.
So I have been dealing with this issue for over 6 months. One day pdfs preview in outlook suddenly stopped working; coming up with error "This file cannot be previewed because there is no previe...
Close all Windows Office apps (Outlook, Word, Excel, etc.) Open "Installed Apps" in Windows. Look for Adobe Acrobat, select "Modify". The Adobe Acrobat Application Maintenance window will open. Select "Next", the select "Repair". This worked for me...