In order to change your administrator password, click Manage under mServer section inside the starting page to start managing youro server.
The following page will be displayed.
Click on the server youwish to change the administrator password for and the following page will be displayed.
Click Reset Root Password and the following confirmation dialog will be displayed.
Click OK and your server will be scheduled for reboot after which the root password will be changed.
Note: you can see the root password at any time, by clicking show next to the option for resetting th epassword.