Hi, I recently must update the configuration of my Outlook365 account on Thunderbird (TB). Before I had classical IMAP and SMTP configuration but now I have to update authentication method to Oaut2. A problem occurred because I was (currently I'm) not able to sync the mail of my Microsoft account. So, I installed the OWL add-on and add my account and seems to work and sync correctly... My question is: configuring TB with Exchange, do all my mails still remain saved on my PC or not? I understand that Exchange has not IMAP, this is important for my work. In my little experience if I want to have sync mail from outlook365 and mail in TB I must use Exchange, but does this configuration allow me to effectively download and save all mail, contacts, attachment in the .thunderbird folder, local folder in my Linux PC? If I right click on a folder -> properties, the location field is empty and the "Size on disk" is 0 KB..... I'm a little bit worried about those info... Can anyone help me? Thanks a lot in advance, I did not find an answer to my great doubt yet. :)