http://msmvps.com/blogs/ehlo/archive/2007/11/27/1360925.aspxAfter you deploy your Microsoft Exchange Server 2007 infrastructure, you must make sure that all your clients, such as Outlook Web Access and Outlook 2007, will be able to connect to the services by using an encrypted session without receiving an errorenCommunityServer 2008.5 SP2 (Build: 40407.4157)