Using older versions of Outlook for Mac for personal email and calendar
I'm using a 2022 13 inch MacBook Air running Apple M2 and MacOS Ventura 13.5.1. What I experience is that if you revert to Legacy Outlook, run it for a couple of hours and then revert back to New Outlook, everything works fine for a couple of hours. Then, it starts randomly removing attachments and pictures until it removes them all. As mentioned in this feed, it seems to be something with a permissions issue for cache pictures. If you have your Sent folder open, you can literally see it happen. You can send an email with a picture in it, it shows up with the picture in your Sent folder right away, then, it takes about 5 to 10 seconds and the email remains, but the picture goes away (changes to the broken link). Same with an attachment. And, I've tried using delay send for the new Undo feature or schedule send, same thing. What seems to be going on is Outlook is capturing the picture and attachment in a cache folder (as it does on the PC side) and then when it goes to pass it off to the Send mechanism, access to where it stored the picture/attachment is blocked and the sending and thus saving the sent email turns into broken.
What I'm using now is the New Outlook on Windows 11 using Parallels. Guess what, Windows 11 on Parallels works every time, NO issues!