I have not used Outlook for some years as not saving Sent emails has been a continual problem through various versions of Outlook from 2007. I thought Microsoft would have fixed it by now.
I monitor two Gmail accounts which display correctly in Thunderbird and Gmail webmail, and both apps save sent emails in a Sent folder.
I thought I would try using Outlook 365 again as there are features of Outlook I prefer, and it uses tools familiar from other Office programs.
So I set up the accounts and synchronized my emails from the other places when asked, and all my Inbox came up correctly together with new emails received today. All my previously Sent emails displayed correctly even though they had been sent from Thunderbird or Gmail webmail so I thought maybe the issue had been fixed. However when I sent a new email today from MS Office Outlook 365 it was not recorded as being saved. So the old problem persists.
I have unchecked the File/Options/Mail/Save copies of messages in the Sent items folder, rebooted, and rechecked the File/Options/Mail/Save copies of messages in the Sent items folder again, with no change. In the registry editor the DWord is set to 1 and attempting to access the the HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\x.0\Outlook\Preferences there was no Office\x.0\Outlook\Preferences so I could not reset per the instructions on a variety of websites. There was nowhere to put 16 as the version.
I can't imagine I am the only one with this problem. Is there anyone who has a solution to this?