Hi,
Yes, you mean Office365 right?
If that's the case; here's the ""possible"" setup for your Microsoft Outlook / Exchange info that you would enter after you install the plugin (WPMail SMTP) above;
From Email: your email or your company email
From Name: same, your name or company name
SMTP Host Name: smtp.office365.com
Type of Encryption: TLS
SMTP Port: 587
SMTP Authentication: Yes
Username: Your Email Here
Password: Your Password for the above email you use.
Hope that helps. After the setup, you can test from within the Dashboard within the plugin, Testing tool is on the very right hand side.
Let me know if that helps. :)