For new Consumers users who are able to sign-up for an account with Self-Registration enabled:

1) Go to the account's login screen and click Register Now

2) Enter your full name and email address. 

If your Administrator enabled you to register with a specific email domain, click Submit.

If your Administrator sent you an invitation code, enter or paste that code, then click Submit.

You will then see a confirmation window asking you to check your email to finish registration.