I have two forest in the office. We need to synchronize group,user,contact object of two forest which in trust relationship. But we would like to prevent some group,user,contact from being exported to other forest. Is there any way to export some group,user,contact to keep sync and exclude some group,user,contact to be synced and exported ?

Yes - use FIM set definitions to drive set transition MPRs which add outbound sync rules only to the objects you want to sync out to AD.Bob Bradley (FIMBob @ http://thefimteam.com/) ... now using Event Broker 3.0 @ http://www.fimeventbroker.com/ for just-in-time delivery of FIM 2010 policy via the sync engine

Thank you very much. I do not understand FIM well. What is MPR ?

An MPR is a Management Policy Rule ... the FIM terminology that you need to familiarise yourself with can be found here (look under "Technical Components of a Business Policy")Bob Bradley (FIMBob @ http://thefimteam.com/) ... now using Event Broker 3.0 @ http://www.fimeventbroker.com/ for just-in-time delivery of FIM 2010 policy via the sync engine