We are deploying a Microsoft Exchange 2010 server environment, which will have a ACE 4710 front end. What we are finding is that if a server goes down, a client will need to re-authenticate to a new server. The server team has informed me that if they use Microsoft SLB this does not happen. They have also mentioned that we are getting basic authentication, rather than NTLM. As a result I have read several posts/articles which mention forcing NTLM on the ACE, but none go into real detail.
A couple of official Cisco documents point to having the Exchange Server, and Client both set to use NTLM. So on the server you do not need to select MAPI encryption. I am told this is not an option here, because a multitude of clients are supported, from Outlook 2003, through to 2010.
Any pointers would be much appreciated.