If I understand the problem correctly - when you send a reply to a message, you return to that message in the inbox. That is expected behavior.
If you move or delete messages, you can tell Outlook.com what to do next - those settings are at https://outlook.live.com/mail/options/mail/layout - near the bottom. But that only applies when you move or delete a message.
For the short term, this link may bring up the old interface: https://outlook.live.com/owa/?path=/classic but it will be disabled 'soon'.
Get help with the new Outlook.com
https://support.office.com/en-us/article/get-he...
Learn about the new Outlook.com
The expected behaviour is supposed to go back to the inbox, not to the open message that you just responded/replied/forwarded! That is what I am trying to achieve again -- it changed sometime last week and I am unable to go back to just the inbox list.
Per the link provided above, there is nothing that allows messages to close and go back to inbox!
Mrs. Poremsky offered to find out the solution to my problem, that is why I am asking again...
Can you help me with this or is there a way to contact Outlook directly to get them to explain what and why they changed the settings without warning?
Many thanks in advance, from a Technologically-challenged user