Web ready document viewing in Exchange 2013 disabled?

Hi all,

is web ready document viewing disabled because of that bug (http://technet.microsoft.com/en-us/security/bulletin/ms12-058) in Exchange 2013? Or is there a patch to fix it?

When I try to access an attachment in OWA it says 'The web ready document viewing service has been disabled by the administrator for your organization'...

Any ideas?

Thanks in advance!