When I use my old contact groups or categories in the new Outlook version of Hotmail, it is necessary to save my message as a draft. Then go to the drafts folder and open my message. At that time, the group bursts into individual email addresses.
I can continue to write my message and then send it. In the old Hotmail, these extra steps were not necessary. I could just send it from the original New Message screen. Please do not tell me that I need to reconstruct all of my groups to solve this issue.