i think that is reserved for a future update. not all properties visible in powershell are useable at this time. i know. i spot them when updating my doc scripts and citrix tells me they were made visible by mistake or reserved for an update in the works. and even though citrix may explain the intent and usage to me because of my multiple ndas, i am asked to not use the properties, not document them, or explain them to anyone - even other CTPs.