I received an email stating Update your sign-in technology before September 16th, 2024 to maintain email access. Is this legit or a scam?

No, sadly, not enough. msn is an email SERVICE, not an email CLIENT. How do you connect to msn, Classic Desktop Outlook, Outlook New, Outlook on the web (OWA) through a web browser, Thunderbird, Apple Mail, EM Client, something else?. If you are using Classic Desktop Outlook, Thunderbird, EM Client or something else, what VERSION is it? I see you connect vis IMAP which may be an issue depending on the version of whichever client you use. I can tell you that if you use either Outlook New or Outlook on the Web, there is zero point zip dot nada that you need to do.

My email is msn.com. My host is imap-mail.outlook.com. Is that enough info?

What email clients do you have and use? Please list ALL of them, what version they are, what platform they are installed on, and what protocol (POP, IMAP, or Exchange Server) each uses so we can tell you which ones will work without any changes, which ones will need attention, and what specific attention each of these will need. Thanks!!

Thanks that’s helpful

Read the linked article that has been posted 3 times in this thread. Ask us what you don't understand in that article.