How do I add a PDF preview handler to Outlook?

In Outlook, navigate through “File > Options > Trust Center > Trust Center settings > Attachment Handling” and:

1. Make sure that “Turn off Attachment Preview” box is unchecked.
2. Click “Attachment and Document Previewers” button and check if “PDF Preview Handler” is enabled/ticked in the list in the opened window.
3. Click on Ok, and close the window and Outlook
4. Open Outlook, and try previewing a PDF