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I have Office 365 Business Essentials with a single user. I have enabled IMAP access in Exchange Admin Center for this user's mailbox.

I have 2 factor authentication enabled on the account and have generated an app password.

I'm using the settings listed in my outlook 'Sync email' settings:

outlook.office365.com
port 993

I am using my username me@example.com and my app password (xxx) however my login fails. e.g.

$ openssl s_client -connect outlook.office365.com:993 -crlf
CONNECTED(00000005)
<snip>
* OK The Microsoft Exchange IMAP4 service is ready. [...]
a001 login me@example.com xxx
a001 NO LOGIN failed.

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