If your administrator has allowed it, you can use CrowdID to change your password across all Crowd applications. Note that you will need to be logged in to Crowd before you can do this.
When attempting to log in to Crowd, you can also reset your password. This is useful when you have forgotten the password. Crowd will send you an email message containing a unique, randomly-generated URL. When you click the link on that URL, you will go to a screen where you can choose your own new password.