Provided that you are authorised to use Crowd, you can change the profile information for your username.
To update your user profile,
Screenshot: Crowd user profile
Which user directories are updated?
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 profile details, the change will be applied to all directories which the 'crowd' application has permission to update. Your Crowd administrator defines the application permissions, as described in the Crowd Administration Guide.