You can configure the Apple Mail app to connect to your email and calendar events on the Office 365 server.

Procedures: (Screen capture base on macOS 10.14.x with Mail app version 12.4)

  1. Launch Mail Illustration of the Mac Mail icon. (Click the icon in the dock or go to the Applications folder to open it.)

  2. Add a mail account:
    • If you have not previously configured an account in Mail you will be prompted to add an account. Click Exchange and then click Continue.
      Illustration of the email account type selection screen
    • Otherwise, go to the Mail menu and click Add Account -> Exchange and then click Continue.

  3. Enter the following information and then click the Sign In button
    • Full Name: the name you want displayed on your outgoing mail
    • Email Address:
      Illustration of the Exchange email account information screen

  4. Choose Sign In when prompt for the setup method.
    Illustration of the sign in method screen

  5. If your account is enabled with Multi-Factor Authentication - MFA, you need to "Approve" the login from the Microsoft Authenticator app.
  6. Select the apps you want to use with this account and then click Done.
    Illustration of the app sync selection screen

  7. Now the Mail will start to download your emails.

Note: After configuring Apple Mail, be sure to change the Trash setting to never permanently erase messages. Otherwise, you won't be able to restore deleted messages.