I'm trying to integrate a Cisco Ace 4710 with exchange 2010. Basically i'm trying to load balance access from clients to the CAS role. Using https access to the VIP created for the CAS works without problems. However when i try to load balance MAPI (the sysadmins have set static ports for this services) the outlook client requests authentication and it goes nowhere. Has anyone seen this, or tryied to implement a solution like this?