How to Reset Password in Plesk Panel Version 12.5?
To change the password of the user account in plesk panel, do the following.
Step 1: Login to the plesk account to which you going to change the password.
Step 2: In home page, click Account and select My Profile.
Step 3: Type the new password in the Password field. Type the same Password again in the Confirm password field and click OK.
Now you will get an alert text for the changed password as shown in the below image.