OWA—Password change
To change your Active Directory password through OWA, follow this tutorial.

First log into OWA.
Select Options in the upper right.

Now select the Change your password link.

Now enter your old password (the one you have been using or the one given to you by the help desk) along with the new password you want to set. Click Save.

Your password is now changed.
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You can always call the Help Desk if you have questions: 724-552-2500.