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The first screen you see is very similar to student email service Live@edu where one logs into www.outlook.com to access their email. Given time, Outlook Live and Live@edu will also be ported over to the new Office 365 variant, "for education".
The start page acts as a dashboard for ordinary users of Office 365 to access Office Web Apps, collaborative SharePoint pages, the corporate website and setup applications to set up the desktop applications, like Outlook.
The desktop applications include Lync 2010 and a configuration program which sets up your Outlook with the relevant settings to your cloud-based corporate email.