Using Classic Outlook on Windows for personal email, calendar, and contact management
The new Outlook preview is un-fortunately causing un-necessary wasted time in my work day. If this is a feature important to the new Outlook, then at the very least add a "Click button" on the preview screen to allow the attachment to port over to the APP of choice.
The default preview for PDF does not even have the basic zoom function which I need all to often. I use REVU as my goto PDF reader, which I need for at least 60% of the pdf attachments I receive.