Hello,
It sounds like Outlook keeps dropping your login info or just failing to authenticate. Since you said this happens for every IMAP account you have on there I need a little more context.
- Who is the email provider for those accounts?
- Also did you recently enable two factor authentication or change your passwords for any of them?
A lot of providers nowadays need you to generate a specific app password for desktop clients instead of using your regular web password. Hit me back with your provider and which version of Outlook you are using so we can get this sorted.