I am having trouble reorganizing my folders in the NEW Outlook Preview for Windows

I have switched to using the NEW Outlook for Windows. Everything was fine until I tried to reorganize my folders. I want to put them in specific order but when I try to move them I cannot move main folders to a new main position. It will only let me put them into another main folder. I have an order with main folders, sub folders, and sub sub folders, etc. When I switched to the NEW Outlook it alphabetized my folders which put them out of my order. I went to drag them into their proper place but it will only let me put them into other main folders. I cannot seem to figure out how to put main folders in between other main folders. It used to show a little gray box when I was about to insert a folder into another folder and a line when I was going to drag it in between other folders. Now it is only the little box that makes it go into the other folder.