Using Classic Outlook on Windows for personal email, calendar, and contact management
I am sorry, I just now saw your comment. Yes, you can revert, but only until end of year when they force the new version.
To revert for the moment. In the upper righthand corner there is an option to click to go back so we can do whatever we can do to preserve them. I have moved some into the active synced cloud one.
It is a complete nightmare. It is clear that what they are doing is forcing people to move those files into the main synced cloud one and pay money for more cloud space.
Because we will no longer have on our local drive, they will not really be our private files. We are exposed.
Also, if you have dragged emails into an explore folder for keeping, they will no longer open in the new version.