Incoming and Outgoing server's settings for Office 365.
IMAP/POP/SMTP server settings
IMAP Settings
Server: outlook.office365.com
Port: 993
Encryption: SSL/TLS
POP Settings
Server: outlook.office365.com
Port: 995
Encryption: SSL/TLS
SMTP Settings
Server: smtp.office365.com
Port: 587
Encryption: STARTTLS