you can get it here : http://www.microsoft.com/en-us/download/details.aspx?id=41994
a good article for Exchange blog on a cool new feature (DLP in Exchange) is available here : http://blogs.technet.com/b/exchange/archive/2014/02/25/data-loss-prevention-in-exchange-just-got-better.aspx
If you want to know more about this SP1 and what there is inside : http://buenoflex.com/microsoft-exchange-2013-sp1/
Arnaud Buonaccorsi - GSX Groupware Solutions
http://www.buenoflex.com
http://www.gsx.com<= The monitoring solution for Exchange and Sharepoint