How to reset passwords
Navigate to your CDX Course page and log in to your account. From the Administration block, locate the Site Administration folder. Then, click Users, Accounts, and Browse list of users. Find the user whose password you wish to reset and click the gear icon under Edit.
Type a new password in the New password field. You can also check the Force password change box to force the user to choose a new password upon logging in.
When you are finished, click Update profile.