How will the Silverlight DRM client support WM DRM-encrypted content?
The final release version of Silverlight 2 will support playback of WM DRM-encrypted content by dynamically generating a PlayReady License Challenge for that content using a LAURL supplied by the application through the MediaElement APIs. No re-encoding or re-encryption of existing WM DRM-encrypted content will be necessary , however a PlayReady license server will be needed to deliver all licenses to the Silverlight 2 plug-in, whether the content is encrypted using WMDRM or PlayReady.