We have seen issues to where the MIISERVER.EXE process spikes with memory usage, and CPU usage on the Synchronization Service Server while exporting to Microsoft Exchange 2010.  You could also see the MIISERVER.EXE service crash and restart.  If you see this, this is an issue with .NET Framework. 


Please find below two hyperlinks that will lead you to hot fixes to install that will resolve this issue for you.


  • Microsoft Identity Lifecycle Manager 2007 Feature Pack 1 Service Pack 1 (3.3.1139.2) or later
  • Microsoft Forefront Identity Manager 2010