Step 1: Go to office.com. You will be redirected to this page. Just click sign in and use your SMCL Microsoft Account. (ex. [email protected]).
Step 2: Click the circle icon at the top right corner of your screen. Then Click the "View Account" Link.
Step 3: Once you have been redirected in this page, just go to the Password section.
Step 4: You will be redirected on to this page where you'll gonna be ask to enter your old password and your new password. One completed, just click the submit button.