Using New Outlook on Windows for professional communication and productivity
Hello Adriana H
Hi, I'm Karl and will be happy to help you today.
There is no logoff option in the "new Outlook" which is no different than the Mail app which it will eventually permanently replace.
The "new Outlook" is essentially "Outlook on the web" wrapped in an app framework with the added functionality to add external IMAP accounts. Unlike accessing sn Outlook.com account via a browser which only involved the one account, the "new Outlook" can hav up to 10 accounts configured. As for the "File" tab, that only applies to the classic Outlook desktop program (part of Office). There is also no logoff option in Outlook desktop.
If you have any questions, don't hesitate to ask, we're here to help you further if needed.