Ok I set the CAS server by using this command.
get-MailboxDatabase | set-MailboxDatabase -RpcClientAccessServer server.domain.lcl
And now the EMS is reporting back that this is the CAS server for the network when I run the query:
get-mailboxdatabase | fl *rpc*
Yet, many clients running Outlook 2007 or Outlook 2010 are still seeing the other server "server2" we'll call it as the server in their account settings (where you go to see what server or FQDN you're pointing to. Is there anyway to fix this on these clients without setting up another profile?