You can use Calendar notifications to receive text message notifications when items in your calendar are updated or as reminders for appointments and meetings in your Outlook Web App calendar. You can also receive a daily text message that includes your agenda for that day. To set up Calendar notifications:
In a web browser, sign in to Outlook Web App using the URL provided by the person who manages email for your organization. Enter your user name and password, and then select Sign in.
At the top of the page, select Settings > Options > Settings > Calendar
Go to Text messaging notifications.
Note: If you haven't already done so, you'll need to set up text messaging first, and then select Set up calendar notifications.
Choose the options you want, and then select Save.