Outlook Preview PDF failed

First of all, to preview word/excel, etc. in Outlook, the Office apps must be all in the same version, so said google.

Solution: Now, for PDF preview, Office/Outlook does not provide this, it's said to be provided by Adobe. Therefore, Adobe reader and Outlook must be in the same bit. (32bit or 64bit).

Solution source: https://support.microsoft.com/en-us/office/outlook-pdf-preview-error-this-file-cannot-be-previewed-because-there-is-no-previewer-installed-for-it-b78bfe24-ba13-44bd-8289-1919ece7ded2