You can change your own password.
If your administrator account gives you permission to manage users and groups, you can change the passwords of other administrator accounts.
To Change Your Own Password:
Log on to Enterprise Manager.
Right click the Enterprise Manager item, and select Change Password to display the dialog box.
In the Password field, type your current password.
In the New Password field, type the new password.
In Confirm New Password, type the new password again, then click OK.
Note: The passwords you type appear as a series of asterisks (***).