You can go to the Crowd 'Login' screen and request the ability to 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.
To reset your password,
Screenshot: Forgotten password
Screenshot: Reset password
Password change applies to one user directory only
In most cases, your username will be defined in one user directory only. But some organisations may have more than one user directory. For example, your username may be defined in Crowd for JIRA use, and also in another Crowd-connected directory (e.g. LDAP) for use in another application. If you change your password, the new password will apply only in one directory: the directory mapped to the 'crowd' application and defined as first in the directory sequence. Your Crowd administrator can define the order of the directories, as described in the Crowd Administration Guide.