I have a PC running office 365 which includes Outlook.
The following folders are missing trash / deleted items, sent mail.
As a consequence of this, if I accidentally delete an email I cannot recover it. Main problem is that when I reply to an email using the reply function the reply email disappears. If I send a complete new email it can be found in the Outbox but those sent via reply from email just disappear. There is just a message i you replied to this message on "date"