This article assumes that you are already using Outlook 365 and would like to add your new e-Mail account to it.:
Open Outlook 365:
Click on FIle in the Left upper corner:
On the page that appears, click on Accounts settings -> Account Settings.
Outlook will welcome you and ask you to Enter your email address:
Please enter your email address in that field. For example firstname.lastname@example.org.
Under "Advanced Options" choose "Let me set up my account manually"
Next, this screen will appear:
Here you can choose if you want to use
A) IMAP (leaving all E-Mail on the server so that multiple devices can look at the same email)
B) POP (this will download all your email onto your computer and remove it from the server)
On the next Screen enter your email password:
Outlook will detect all the necessary settings from our system.
You can now send and receive email.