Hi, Salome.
Are you or your organization currently an Adobe Marketing Cloud customer?
e.g. using Adobe Analytics, Adobe Target, Adobe Social, etc.
If so, your organization's admin can assist you with what to enter for the company name and user name. They would have previously set up an account for you, or else they would need to.
If you are not a current customer, but you would like to find out more about what we can do to help you/your organization, give us a call: http://www.adobe.com/products/request-consultation/marketing-cloud.html
Kind regards,
- Carey