Change your Sitecore password
How to change your automated password when you log in to Sitecore for the first time.
When you log in to Sitecore for the first time, one of the first things you must do is to change your password to one that you know and can remember. You cannot change your user name.
If you have forgotten your password, on the login page, you can submit a request to have your current password sent to you in an email. However, if you have entered the wrong password a number of times and your account has been locked, the email will not be sent to you. In this case, you must ask your system administrator to unlock your account and create a new password for you.
To change your Sitecore password:
Log in to Sitecore, and on the Sitecore Launchpad, click Control Panel.
In the Control Panel, in the My settings section, click Change password.
In the Change Password dialog box, enter your current password and then enter and confirm your new password.
Click Change password.