Once you've recieved your email with login credentials for the Trial Portal, you can log in by clicking the Login link at the upper left of your Trial Portal page.

You'll see a secure (https) login page like this one:

Enter the User Name and random Password that were sent in your email. Click the Login button.

After loggin in, you'll notice your user account Display Name in the upper left. Clicking on this text will take you to your user account page.

 

Once there, you should change your password. Remember, your portal's security is only as strong as the passwords the users choose. Please ensure that you include a mix of uppercase and lowercase letters, numbers, and symbols. Don't make anything that spells a common word. Be sure to write this password down so you remember it.

You'll be presented with a dialog for changing your password.

Enter your current password at the top, then the new desired password in the two subsequent boxes. Click "Change Password" to commit the changes.