Hello, I have read the thread http://social.technet.microsoft.com/Forums/en-US/exchangesvradmin/thread/b9c895a8-ec11-45ca-a91a-34dc77582e88 but no reply from the person that originally asked the question as to know if the recommendation given has worked. Our scenario is: we have Exchange 2007 Mailbox, CAS, 2 HUB and UM. Before installing SP3 we were able to connect the EPA but after deploying the SP3 no success in connecting EPA. The only server to which we didn't install SP3 was the UM because the SP3 requires language packs to be uninstalled first. We followed the quoted documentation in the thread mentioned above but no success in connecting EPA to the Exchange's databases. Any further suggestions to troubleshoot this problem are welcome. MC.