If you would like to update the password associated with your School's Tableau email, you will need to login to Tableau and update the password on their system.
Go to 10az.online.tableau.com and login using your School's current Tableau email and password.
Click on your name in the top right corner, and then click on My Account Settings.
Next, Select Change Password.
You will then be prompted to enter your current password as well as the new one.
Please remember to share the updated password with your team.