Looking to see if anybody has had experience

integrating Siebel Activities and Contacts with Exchange 2010 in a way other than SSSE.  We have a very high profile requirement to get this in production as quickly as possible and have been struggling with SSSE for over a year now with limited success.  We have a high priority SR open on the issues, and most of them have been addressed, but still have a show stopper that has not been completely fixed yet.  We have gotten a full explanation as to what the root of the problem is and where engineering is at in trying to fix it, but