TL; DR: IMAP outlook.office365.com:993 SSL/TLS; SMTP smtp.office365.com:587 STARTTLS.
Settings > Mail, Contacts, Calendar > Add Account
- IMAP server: outlook.office365.com
- Security type: SSL/TLS (Accept all certs)
- Ensure port is 993
- SMTP server: smtp.office365.com
- Security type: STARTTLS (Accept all certs)
- Ensure port is 587
Thanks for the guide! It was extremely helpful in setting up my email account.