Hello,

 

Now that Windows 8.1 is out in the wild, please head to this address and find everything that is new with the Mail App :

 

Supporting Windows Mail 8.1 in your organization - Exchange Team Blog - Site Home - TechNet Blogs
http://blogs.technet.com/b/exchange/archive/2013/10/18/supporting-windows-mail-8-1-in-your-organization.aspx

 

This is surely a good Reading :)

 

Cheers,

 

João Ribeiro