The new Office 2013 version is bringing Document protection to the cloud for the first time. There is a service plan in OFF365 / Azure named Windows Azure AD Rights Management (AADRM) . That is

Here is the PPT presentation from my breakout session “Implementing Office Web Apps Server” @European SharePoint Conference last week: SLIDES

If you follow the TechNet article “Deploy Office Web Apps Server”  to prepare a Server 2012 you need to run this PS> Add-WindowsFeature Web-Server,Web-Mgmt-Tools,Web-Mgmt-Console,Web-WebServer,Web-Common-Http,Web-Default-Doc,Web-Static-Content,Web-Performance,Web-Stat-Compression,Web-Dyn-Compression,Web-Security,Web-Filtering,Web-Windows-Auth,Web-App-Dev,Web-Net-Ext45,Web-Asp-Net45,Web-ISAPI-Ext,Web-ISAPI-Filter,Web-Includes,InkandHandwritingServices works fine,  but if you plan Lync 2013 you will see