iPhone

1. Open Settings on your iPhone.
2. Tap "Calendar".
3. Tap "Add Account" > Exchange.
   1. If Exchange does not work, try using Outlook.com instead.
4. Enter your username and password for your Outlook account.
5. When prompted, give the app permissions to sync your data.

Android

1. Open the Outlook app and select the calendar from the bottom right.
2. Select the three-line menu icon top left.
3. Select the Add Calendar icon on the left menu.
4. Add your Outlook account when prompted and complete the setup wizard