Comment by Enderboi

We first discovered this while troubleshooting why we were receiving logins with an old password.. after updating the settings in Outlook. They had no other email clients, but the 'New Outlook' didn't actually send the updated password to the Microsoft cloud due to a bug :P

Imagine my surprise discovering that this little banner in their Outlook settings that said "Using Microsoft sync technology" actually means "This is no longer really a local IMAP client".