To do so you need to perform the following steps
1. Click on the Office symbol in the upper left corner
2. Click on “Prepareâ€
3. Click on “Document Propertiesâ€
4. Click on “Advanced Properties…â€
5. Click on the “Summary†tab
6. Put a checkmark in the “Save preview picture†checkbox
I hope this helps, I know it’s been a while since you posted but I saw it
for the first time today. (I was looking for the solution myself)