To share a calendar with another user in Outlook Web App, please follow the steps below:
1. Log into Outlook Web App at http://mail.secureowaonline.com

2. Select the Calendar icon in the bottom left corner.

3. In the left-hand navigation pane, select the calendar you would like to share.

4. Click Share above the calendar.

5. Click Share This Calendar.

6. In the To field, enter the recipient's e-mail address.

7. Select the calendar content that you would like to share.

8. Enter a Subject and body text as needed.
9. Click Send.
