Worksite Commuication Server and Exchange 2010

System

Hello,
We are in the process of migration to Exchange 2010 from Exchange 2007. We are currently running WCS 8.5 SP1 Update4. My understanding is that SP2 need to be installed for WCS to work with Exchange 2010. Have anyone gone through a Exchange 2010 migration with WCS? If you could share your experience, I would greatly appreciate it. Thank you.