Enable Fast Cache
Enable this property to allow players to cache the content locally prior to playback.
Fast Cache is only used by clients that connect to a unicast stream.
When Fast Cache is enabled, Windows Media Services cannot use intelligent streaming.
If you are using Fast Cache with a server-side playlist, clients that connect to your server should use the mms:// URL moniker to initiate protocol rollover to either the RTSP or HTTP 1.1 protocol to receive the benefit of the Fast Cache feature.
If you define the src attribute of a server-side playlist media element as being a publishing point on the local server using the lpp:// syntax, you must enable or disable player caching on the source publishing point. Changing the setting of the Enable Fast Cache property on any publishing point except the source will not affect the ability of players to cache content.