Using Classic Outlook on Windows for personal email, calendar, and contact management
Yeah, I assumed you meant this. This is indeed another annoyance. I, fortunately, do not need to do this that often. When I do, I fire up the old Outlook to do so.
I feel for you if you need to do this frequently 😿. I would look for a feedback portal post about this, and upvote it. I hope that they add this, too, but it's probably unlikely due to this one being solely online versus utilising local PSTs and OSTs. Fingers crossed that they do, though 🤞🏽
UPDATE
Check out here: https://feedbackportal.microsoft.com/feedback/search/89a8afa3-2e1c-ec11-b6e7-0022481f8472?q=allow+dragging+between+accounts
I am going to go through and upvote all relating to this. There are several about the inability to drag to your desktop (or file Explorer in general) too, which is another missing feature / annoyance.