As part of the continuous improvement and evolution of the Microsoft Azure services, Microsoft is proposing a new administration and simplified administration portal for Azure in preview.
To use this incoming new portal, just go to https://portal.azure.com/
NOTE not all Azure services are available through the preview portal. When not available, you will get a link to redirect you to the current portal
Off course, the current “classic” administration portal is still available with the URL https://manage.windowsazure.com