Adding Outlook to Sharepoint 2013

Hi

I have just installed Sharepoint and Exchange 2013 in our organisation.  We want to add "Outlook" to the blue ribbon bar similar to Office 365. 

In previous versions there was obviously the OWA Web Part.  I understand that SP2013 and Exchange 2013 are now more tightly integrated so I presume this is just a matter of config but i'm unclear how to achieve it and google is turning up nothing.

Any pointers would be greatly received. 

We have Office Web Apps Installed and working nicely so this is really the final piece of the puzzle.

Thanks in advance