Add your email account to Outlook
Assuming you already have Outlook installed on your computer, adding your work Office 365 email account is very straightforward.
In Outlook, select File then Add Account. If this is the first time you’ve opened Outlook, skip to the next section.
Enter your company email address and click Connect.
If prompted, enter your password, then select OK and Finish to start using your email account in Outlook.
Select Outlook > Preferences > Account.
Click the plus (+) sign then New Account.
Type your company email address then click Continue.
Type your password then click Add Account and Done.